Initial plan

Merge pull request #300 from rubys/fix-autocomplete-json-accept
Ask for JSON when autocompleting people to ping
2026-10-28 00:16:48 +09:00 · 2026-10-05 14:25:10 +00:00 · 2026-10-05 16:17:10 +02:00 · 2026-10-05 16:16:25 +02:00 · 2026-10-05 16:15:23 +02:00 · 2026-10-05 15:53:19 +02:00
164 changed files with 3931 additions and 774 deletions
@@ -50,3 +50,6 @@

 # Ignore test files
 /test/
+
+# Agent session state — worktrees under .claude/ are whole extra checkouts of this repo
+.claude
@@ -20,13 +20,12 @@ updates:
      semver-minor-days: 3
      semver-patch-days: 2
      default-days: 7
+      exclude:
+        - "brakeman"

-  - package-ecosystem: docker
-    directory: "/"
-    schedule:
-      interval: weekly
-    cooldown:
-      semver-major-days: 7
-      semver-minor-days: 3
-      semver-patch-days: 2
-      default-days: 7
+  # No docker ecosystem. Our base image tag is a build arg
+  # (`FROM ruby:$RUBY_VERSION-slim`), which the updater cannot read, so the
+  # entry only ever matched nothing — worse than no entry, because it looked
+  # like coverage. Ruby base image bumps are a manual, reviewed step here, as
+  # they are across the rest of the fleet. Keep Dockerfile, Dockerfile-export
+  # and .ruby-version on the same version by hand.
@@ -16,12 +16,12 @@ jobs:

    steps:
      - name: Checkout code
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
        with:
          persist-credentials: false

      - name: Set up Ruby
-        uses: ruby/setup-ruby@319994f95fa847cf3fb3cd3dbe89f6dcde9f178f # v1.295.0
+        uses: ruby/setup-ruby@a0102e0972be65f351c307e2d64b9314a57c8073 # v1.324.0
        with:
          ruby-version: .ruby-version
          bundler-cache: true
@@ -35,12 +35,12 @@ jobs:
      contents: read
    steps:
      - name: Checkout code
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
        with:
          persist-credentials: false

      - name: Set up Ruby
-        uses: ruby/setup-ruby@319994f95fa847cf3fb3cd3dbe89f6dcde9f178f # v1.295.0
+        uses: ruby/setup-ruby@a0102e0972be65f351c307e2d64b9314a57c8073 # v1.324.0
        with:
          ruby-version: .ruby-version
          bundler-cache: true
@@ -55,15 +55,15 @@ jobs:
      contents: read

    steps:
-      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
        with:
          persist-credentials: false

      - name: Run actionlint
-        uses: rhysd/actionlint@393031adb9afb225ee52ae2ccd7a5af5525e03e8 # v1.7.11
+        uses: rhysd/actionlint@914e7df21a07ef503a81201c76d2b11c789d3fca # v1.7.12

      - name: Run zizmor
-        uses: zizmorcore/zizmor-action@71321a20a9ded102f6e9ce5718a2fcec2c4f70d8 # v0.5.2
+        uses: zizmorcore/zizmor-action@cc914d7f3750a2d13d75c7f184a1060aa0e9d482 # v0.6.4
        with:
          advanced-security: false

@@ -82,12 +82,12 @@ jobs:
        run: sudo apt-get update && sudo apt-get install --no-install-recommends -y libsqlite3-0 libvips curl ffmpeg

      - name: Checkout code
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
        with:
          persist-credentials: false

      - name: Set up Ruby
-        uses: ruby/setup-ruby@319994f95fa847cf3fb3cd3dbe89f6dcde9f178f # v1.295.0
+        uses: ruby/setup-ruby@a0102e0972be65f351c307e2d64b9314a57c8073 # v1.324.0
        env:
          REDIS_URL: redis://localhost:6379/0
        with:
@@ -112,12 +112,12 @@ jobs:
        run: sudo apt-get update && sudo apt-get install --no-install-recommends -y libsqlite3-0 libvips curl ffmpeg

      - name: Checkout code
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
        with:
          persist-credentials: false

      - name: Set up Ruby
-        uses: ruby/setup-ruby@319994f95fa847cf3fb3cd3dbe89f6dcde9f178f # v1.295.0
+        uses: ruby/setup-ruby@a0102e0972be65f351c307e2d64b9314a57c8073 # v1.324.0
        env:
          REDIS_URL: redis://localhost:6379/0
        with:
@@ -44,15 +44,15 @@ jobs:
      IMAGE_NAME: ${{ github.repository }}
    steps:
      - name: Checkout
-        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
        with:
          persist-credentials: false

      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@e468171a9de216ec08956ac3ada2f0791b6bd435 # v3.11.1
+        uses: docker/setup-buildx-action@f87e5991a6d7451dcb8d9637bfbc97413f497069 # v4.4.1

      - name: Log in to GHCR
-        uses: docker/login-action@184bdaa0721073962dff0199f1fb9940f07167d1 # v3.5.0
+        uses: docker/login-action@dbcb813823bdd20940b903addbd779551569679f # v4.6.0
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
@@ -67,9 +67,20 @@ jobs:
          CANONICAL_IMAGE="${REGISTRY}/${IMAGE_REF,,}"
          echo "canonical=${CANONICAL_IMAGE}" >> "$GITHUB_OUTPUT"

+      - name: Compute app version
+        id: version
+        shell: bash
+        run: |
+          set -eu
+          if [[ "${GITHUB_REF}" == refs/tags/v* ]]; then
+            echo "version=${GITHUB_REF#refs/tags/v}" >> "$GITHUB_OUTPUT"
+          else
+            echo "version=${GITHUB_SHA::7}" >> "$GITHUB_OUTPUT"
+          fi
+
      - name: Extract Docker metadata (tags, labels) with arch suffix
        id: meta
-        uses: docker/metadata-action@c1e51972afc2121e065aed6d45c65596fe445f3f # v5.8.0
+        uses: docker/metadata-action@dc802804100637a589fabce1cb79ff13a1411302 # v6.2.0
        with:
          images: ${{ steps.vars.outputs.canonical }}
          tags: |
@@ -87,13 +98,15 @@ jobs:

      - name: Build and push (${{ matrix.platform }})
        id: build
-        uses: docker/build-push-action@263435318d21b8e681c14492fe198d362a7d2c83 # v6.18.0
+        uses: docker/build-push-action@c3c9e263c25d99ce0380d002d59b67737d91b0dc # v7.4.0
        with:
          context: .
          file: Dockerfile
          build-args: |
            OCI_SOURCE=${{ env.SOURCE_URL }}
            OCI_DESCRIPTION=${{ env.IMAGE_DESCRIPTION }}
+            APP_VERSION=${{ steps.version.outputs.version }}
+            GIT_REVISION=${{ github.sha }}
          platforms: ${{ matrix.platform }}
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
@@ -105,7 +118,7 @@ jobs:

      - name: Attest image provenance (per-arch)
        if: github.event_name != 'pull_request'
-        uses: actions/attest-build-provenance@977bb373ede98d70efdf65b84cb5f73e068dcc2a # v3.0.0
+        uses: actions/attest-build-provenance@4d101475d8b20a2381f78447822ac1eab6504dd8 # v4.2.2
        with:
          subject-name: ${{ steps.vars.outputs.canonical }}
          subject-digest: ${{ steps.build.outputs.digest }}
@@ -126,10 +139,10 @@ jobs:
      IMAGE_NAME: ${{ github.repository }}
    steps:
      - name: Set up Docker Buildx (for imagetools)
-        uses: docker/setup-buildx-action@e468171a9de216ec08956ac3ada2f0791b6bd435 # v3.11.1
+        uses: docker/setup-buildx-action@f87e5991a6d7451dcb8d9637bfbc97413f497069 # v4.4.1

      - name: Log in to GHCR
-        uses: docker/login-action@184bdaa0721073962dff0199f1fb9940f07167d1 # v3.5.0
+        uses: docker/login-action@dbcb813823bdd20940b903addbd779551569679f # v4.6.0
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
@@ -146,7 +159,7 @@ jobs:

      - name: Compute base tags (no suffix)
        id: meta
-        uses: docker/metadata-action@c1e51972afc2121e065aed6d45c65596fe445f3f # v5.8.0
+        uses: docker/metadata-action@dc802804100637a589fabce1cb79ff13a1411302 # v6.2.0
        with:
          images: ${{ steps.vars.outputs.canonical }}
          tags: |
@@ -194,7 +207,7 @@ jobs:
          done <<< "$tags"

      - name: Install Cosign
-        uses: sigstore/cosign-installer@d58896d6a1865668819e1d91763c7751a165e159 # v3.9.2
+        uses: sigstore/cosign-installer@6f9f17788090df1f26f669e9d70d6ae9567deba6 # v4.1.2

      - name: Cosign sign all tags (keyless OIDC)
        shell: bash
@@ -1 +1 @@
-3.4.5
+3.4.10
@@ -1,7 +1,7 @@
 # syntax = docker/dockerfile:1

 # Make sure it matches the Ruby version in .ruby-version and Gemfile
-ARG RUBY_VERSION=3.4.5
+ARG RUBY_VERSION=3.4.10
 FROM docker.io/library/ruby:$RUBY_VERSION-slim AS base

 # Rails app lives here
@@ -66,6 +66,9 @@ ENV HTTP_WRITE_TIMEOUT=300
 COPY --from=build --chown=rails:rails /usr/local/bundle /usr/local/bundle
 COPY --from=build --chown=rails:rails /rails /rails

+# Install ONCE backup/restore hooks
+COPY --chmod=755 hooks /hooks
+
 # Set version and revision
 ARG APP_VERSION
 ENV APP_VERSION=$APP_VERSION
@@ -1,7 +1,7 @@
 # syntax = docker/dockerfile:1

 # Make sure it matches the Ruby version in .ruby-version and Gemfile
-ARG RUBY_VERSION=3.4.7
+ARG RUBY_VERSION=3.4.10
 FROM ruby:$RUBY_VERSION-slim as base

 # Install the tools we need
@@ -26,6 +26,9 @@ gem "importmap-rails", github: "rails/importmap-rails"
 gem "turbo-rails", github: "hotwired/turbo-rails"
 gem "stimulus-rails"

+# Rich text
+gem "lexxy", "~> 0.9.24"
+
 # Media handling
 gem "image_processing", ">= 1.2"

@@ -41,6 +44,7 @@ gem "rails_autolink"
 gem "geared_pagination"
 gem "jbuilder"
 gem "net-http-persistent"
+gem "surfguard", github: "basecamp/surfguard" # The SSRF address policy behind RestrictedHTTP
 gem "kredis"
 gem "platform_agent"
 gem "thruster"
@@ -1,3 +1,9 @@
+GIT
+  remote: https://github.com/basecamp/surfguard.git
+  revision: 59e278c01a537755f22791429051891949231ead
+  specs:
+    surfguard (0.2.0)
+
 GIT
  remote: https://github.com/hotwired/turbo-rails.git
  revision: 30cd8fcc6f82c1ad4edd1ed6069ba878f21f02b3
@@ -137,7 +143,7 @@ GEM
    bcrypt (3.1.22)
    benchmark (0.5.0)
    bigdecimal (3.3.1)
-    brakeman (8.0.5)
+    brakeman (8.0.6)
      racc
    builder (3.3.0)
    bundler-audit (0.9.3)
@@ -168,6 +174,7 @@ GEM
    erubi (1.13.1)
    faker (3.5.2)
      i18n (>= 1.8.11, < 2)
+    ffi (1.17.2)
    ffi (1.17.2-aarch64-linux-gnu)
    ffi (1.17.2-arm64-darwin)
    ffi (1.17.2-x86_64-darwin)
@@ -191,7 +198,7 @@ GEM
    jbuilder (2.14.1)
      actionview (>= 7.0.0)
      activesupport (>= 7.0.0)
-    json (2.20.0)
+    json (2.21.2)
    jwt (3.2.0)
      base64
    kredis (1.8.0)
@@ -199,12 +206,14 @@ GEM
      activesupport (>= 6.0.0)
      redis (>= 4.2, < 6)
    language_server-protocol (3.17.0.5)
+    lexxy (0.9.24)
+      rails (>= 8.0.2)
    lint_roller (1.1.0)
    logger (1.7.0)
    loofah (2.25.2)
      crass (~> 1.0.2)
      nokogiri (>= 1.12.0)
-    mail (2.9.0)
+    mail (2.9.1)
      logger
      mini_mime (>= 0.1.1)
      net-imap
@@ -216,7 +225,7 @@ GEM
      logger
    mini_mime (1.1.5)
    minitest (5.26.2)
-    mocha (2.7.1)
+    mocha (3.1.0)
      ruby2_keywords (>= 0.0.5)
    mono_logger (1.1.2)
    multi_json (1.17.0)
@@ -242,7 +251,7 @@ GEM
      racc (~> 1.4)
    nokogiri (1.19.4-x86_64-linux-gnu)
      racc (~> 1.4)
-    openssl (3.3.0)
+    openssl (4.0.2)
    ostruct (0.6.3)
    parallel (1.27.0)
    parser (3.3.9.0)
@@ -346,7 +355,7 @@ GEM
      ffi (~> 1.12)
      logger
    ruby2_keywords (0.0.5)
-    rubyzip (3.0.2)
+    rubyzip (3.4.0)
    securerandom (0.4.1)
    selenium-webdriver (4.35.0)
      base64 (~> 0.2)
@@ -367,18 +376,18 @@ GEM
      rack-protection (= 4.2.1)
      rack-session (>= 2.0.0, < 3)
      tilt (~> 2.0)
-    sqlite3 (2.9.5-aarch64-linux-gnu)
-    sqlite3 (2.9.5-arm64-darwin)
-    sqlite3 (2.9.5-x86_64-darwin)
-    sqlite3 (2.9.5-x86_64-linux-gnu)
+    sqlite3 (2.9.6-aarch64-linux-gnu)
+    sqlite3 (2.9.6-arm64-darwin)
+    sqlite3 (2.9.6-x86_64-darwin)
+    sqlite3 (2.9.6-x86_64-linux-gnu)
    stimulus-rails (1.3.4)
      railties (>= 6.0.0)
    stringio (3.1.8)
    thor (1.4.0)
-    thruster (0.1.15-aarch64-linux)
-    thruster (0.1.15-arm64-darwin)
-    thruster (0.1.15-x86_64-darwin)
-    thruster (0.1.15-x86_64-linux)
+    thruster (0.1.23-aarch64-linux)
+    thruster (0.1.23-arm64-darwin)
+    thruster (0.1.23-x86_64-darwin)
+    thruster (0.1.23-x86_64-linux)
    tilt (2.6.1)
    timeout (0.6.1)
    tsort (0.2.0)
@@ -389,9 +398,9 @@ GEM
    unicode-emoji (4.2.0)
    uri (1.1.1)
    useragent (0.16.11)
-    web-push (3.0.2)
+    web-push (3.1.0)
      jwt (~> 3.0)
-      openssl (~> 3.0)
+      openssl (>= 3.0)
    webmock (3.25.1)
      addressable (>= 2.8.0)
      crack (>= 0.3.2)
@@ -424,6 +433,7 @@ DEPENDENCIES
  importmap-rails!
  jbuilder
  kredis
+  lexxy (~> 0.9.24)
  mocha
  net-http-persistent
  ostruct
@@ -442,6 +452,7 @@ DEPENDENCIES
  sentry-ruby
  sqlite3
  stimulus-rails
+  surfguard!
  thruster
  turbo-rails!
  web-push
@@ -49,7 +49,26 @@ If you'd rather run the Docker image yourself, you can read more about that in t
 > that people have someone to contact if they need help with their account. If that bothers you, put in any
 > email address you want and create yourself a new admin account.

+## Other implementations
+
+Campfire also has implementations in Django, Laravel, Express, Elixir, Go and Rust:
+
+| HTTP workload (requests/sec) | Rails | [Django](https://github.com/basecamp/once-campfire-django) | [Laravel](https://github.com/basecamp/once-campfire-laravel) | [Express](https://github.com/basecamp/once-campfire-express) | [Elixir](https://github.com/basecamp/once-campfire-elixir) | [Go](https://github.com/basecamp/once-campfire-go) | [Rust](https://github.com/basecamp/once-campfire-rust) |
+|---|---:|---:|---:|---:|---:|---:|---:|
+| Room page | 241 | 170 | 164 | 559 | 722 | 3,860 | 36,260 |
+| Messages page | 413 | 196 | 175 | 777 | 1,053 | 5,573 | 40,872 |
+| Sidebar | 552 | 615 | 715 | 4,125 | 1,275 | 19,753 | 34,672 |
+| Search | 435 | 315 | 305 | 1,294 | 1,156 | 7,053 | 33,299 |
+| Post a message | 273 | 154 | 137 | 256 | 801 | 4,767 | 6,896 |
+
+Measured with 16 concurrent clients on an AMD Ryzen AI MAX+ 395,
+with four hardware threads allocated to each app.
+
 ## Development

 You are welcome - and encouraged - to modify Campfire to your liking.
 Please see our [development guide](docs/development.md) for how to get Campfire set up for local development.
+
+## Security
+
+See [SECURITY.md](SECURITY.md) for how to report a vulnerability and a description of our trust model.
@@ -0,0 +1,22 @@
+# Security
+
+Report vulnerabilities through our [HackerOne program](https://hackerone.com/basecamp) or at
+https://github.com/basecamp/once-campfire/security. Note that Campfire is in scope for our security
+program, but is not bounty eligible.
+
+## Trust model
+
+Campfire is self-hosted and single-tenant, so the administrator is the server operator,
+with shell, network, and database access already. Anything requiring the administrator
+role grants nothing they do not already have, and is not a vulnerability.
+
+We do want reports of anything a **non-administrator** can reach, and of any credential or
+network path held by the Campfire process but not by the operator's own shell.
+
+## Intentional behavior
+
+Bot webhook URLs are unrestricted: an administrator can point one at any address,
+including internal ones, because operators legitimately wire bots to their own services.
+Link unfurling is different because any member can trigger it by pasting a URL, so it
+validates destinations through `RestrictedHTTP::PrivateNetworkGuard`. The difference is who
+picks the destination.
@@ -1,165 +1,160 @@
-trix-toolbar {
-  display: none;
-  inset: auto 0 0 0;
-  min-width: 0;
-  position: sticky;
-  z-index: 3;
+/* Resolve Lexxy's palette to Campfire's, in the editor and in rendered messages,
+   so everything follows Campfire's light/dark color scheme */
+.lexxy-content {
+  --lexxy-color-canvas: transparent;
+  --lexxy-color-text: var(--color-text);
+  --lexxy-color-text-subtle: var(--color-text);
+  --lexxy-color-link: var(--color-link);
+  --lexxy-color-ink: var(--color-text);
+  --lexxy-color-ink-inverted: var(--color-text-reversed);
+  --lexxy-color-ink-medium: var(--color-text);
+  --lexxy-color-ink-lighter: var(--color-border-darker);
+  --lexxy-color-ink-lightest: var(--color-bg);
+  --lexxy-color-selected: var(--color-selected, var(--color-bg));
+  --lexxy-color-code-bg: var(--color-bg);

-  .trix-dialog {
-    bottom: 3rem !important;
-    top: auto !important;
-  }
-
-  .trix-button--icon {
-    height: auto !important;
-  }
-
-  .trix-dialog {
-    background-color: var(--color-bg) !important;
-    border-radius: 1rem !important;
-    border: 2px solid var(--color-text) !important;
-    box-shadow: none !important;
-    color: var(--color-text) !important;
-    gap: var(--inline-space);
-    padding: 0 !important;
-    overflow: clip;
-
-    .trix-input {
-      background: transparent !important;
-      border: 0 !important;
-      color: var(--color-text) !important;
-      font-size: max(16px, 1em) !important;
-      padding: var(--input-padding, 0.5em 0.8em) !important;
-    }
-
-    .trix-button {
-      color: var(--color-text) !important;
-    }
-  }
-
-  .trix-dialog--link {
-    .trix-dialog__link-fields {
-      align-items: center;
-      padding-right: 0.3em;
-    }
-
-    [value="Link"],
-    [value="Unlink"] {
-      width: 2.6em;
-      aspect-ratio: 1 / 1;
-      background-position: center center;
-      background-repeat: no-repeat;
-      text-indent: -9999%;
-      padding: 0;
-    }
-
-    [value="Link"] { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' fill='none'%3E%3Cpath fill='%23000' fill-rule='evenodd' d='M18.948 5.258a4.337 4.337 0 0 0-6.108 0L11.217 6.87a.993.993 0 0 0 0 1.41c.392.39 1.027.39 1.418 0l1.623-1.613a2.323 2.323 0 0 1 3.271 0 2.29 2.29 0 0 1 0 3.251l-2.393 2.38a3.021 3.021 0 0 1-4.255 0l-.05-.049a1.007 1.007 0 0 0-1.418 0 .993.993 0 0 0 0 1.41l.05.049a5.036 5.036 0 0 0 7.091 0l2.394-2.38a4.275 4.275 0 0 0 0-6.072Zm-13.683 13.6a4.337 4.337 0 0 0 6.108 0l1.262-1.255a.993.993 0 0 0 0-1.41 1.007 1.007 0 0 0-1.418 0L9.954 17.45a2.323 2.323 0 0 1-3.27 0 2.29 2.29 0 0 1 0-3.251l2.344-2.331a2.579 2.579 0 0 1 3.631 0c.392.39 1.027.39 1.419 0a.993.993 0 0 0 0-1.41 4.593 4.593 0 0 0-6.468 0l-2.345 2.33a4.275 4.275 0 0 0 0 6.072Z' clip-rule='evenodd'/%3E%3C/svg%3E"); }
-
-    [value="Unlink"] {
-      background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' fill='none'%3E%3Cpath fill='%23000' fill-rule='evenodd' d='M18.954 5.264a3.58 3.58 0 0 0-5.04 0l-2.157 2.144a.993.993 0 0 0 0 1.41c.392.39 1.027.39 1.418 0l2.157-2.144a1.565 1.565 0 0 1 2.204 0c.607.603.609 1.58.005 2.186l-2.348 2.355a.993.993 0 0 0 .006 1.41 1.007 1.007 0 0 0 1.419-.007l2.347-2.354a3.528 3.528 0 0 0-.01-5ZM5.257 18.852a3.59 3.59 0 0 0 5.041.015l2.6-2.554a.993.993 0 0 0 .01-1.41 1.007 1.007 0 0 0-1.419-.009l-2.6 2.554c-.615.603-1.603.6-2.214-.006a1.554 1.554 0 0 1-.012-2.195l2.539-2.58a.993.993 0 0 0-.016-1.41 1.007 1.007 0 0 0-1.418.015l-2.539 2.58a3.54 3.54 0 0 0 .028 5Z' clip-rule='evenodd'/%3E%3Cpath stroke='%23000' stroke-linecap='round' stroke-width='2' d='M10.233 5.78V3.769M5.968 9.802H4.21M7.343 7.107 5.968 5.781M14.348 17.523v2.013M18.613 13.502h1.758M17.238 16.196l1.375 1.327'/%3E%3C/svg%3E%0A");
-      border-top-right-radius: 1em !important;
-      border-bottom-right-radius: 1em !important;
-    }
-  }
+  /* Campfire's message lines stack without extra block margins */
+  --lexxy-content-margin: 0;
 }

-trix-editor {
+lexxy-editor {
  &.input {
+    --lexxy-editor-padding: 0;
+
+    /* One line high when empty. Lexxy derives this from attr(rows lh, 8lh),
+       whose resolution differs between Chrome versions — pin it instead of
+       risking the 8-line fallback */
+    --lexxy-editor-rows: 1lh;
+
+    background: transparent;
+    border: 0;
+    border-radius: 0;
    min-height: 24px;
  }

  .attachment--content {
    margin: 0;
    display: inline-flex;
-
-    .attachment__toolbar {
-      top: 0;
-      z-index: 2;
-    }
  }
 }

-.trix-button-group--file-tools,
-.trix-button-group--history-tools {
-  display: none !important;
+/* The mentions menu needs a solid surface — the editor's transparent canvas
+   would let messages show through it */
+.lexxy-prompt-menu {
+  --lexxy-color-canvas: var(--color-bg);
+
+  border: 1px solid var(--color-border-dark);
 }

-.trix-button-group,
-.trix-button {
-  border: 0 !important;
-  margin: 0 !important;
-  border-radius: 0.3em !important;
-  box-shadow: none;
+/* Same for the code block language picker: with a transparent canvas the
+   native dropdown renders white-on-white in dark mode */
+lexxy-editor lexxy-code-language-picker select {
+  background-color: var(--color-bg);
+  color: var(--color-text);

-  &::before {
-    opacity: 1 !important;
-  }
-
-  @media (prefers-color-scheme: dark) {
-    &::before {
-      filter: invert(100);
-    }
-  }
-
-  &.trix-active {
-    background-color: var(--color-text) !important;
-
-    &::before {
-      filter: invert(100);
-    }
-
-    @media (prefers-color-scheme: dark) {
-      &::before {
-        filter: invert(0);
-      }
-    }
-  }
-
-  &.trix-button--remove {
-    background-color: var(--color-negative);
-    border-radius: 1.8em !important;
-
-    &::before {
-      filter: invert(100);
-      background-size: 70%;
-      background-image: url("minus.svg");
-    }
+  option {
+    background-color: var(--color-bg);
+    color: var(--color-text);
  }
 }

-[data-trix-content-type~='application/vnd.campfire.mention'] {
-  .trix-button-group {
-    display: inline;
+/* The toolbar only shows when rich text mode is toggled on (see composer.css) */
+lexxy-toolbar {
+  /* Wide, airy button spacing like the Trix toolbar */
+  --lexxy-toolbar-gap: 1.3em;
+
+  /* Match the compact size of the Trix toolbar buttons */
+  --lexxy-toolbar-button-size: 1.7em;
+  --lexxy-toolbar-icon-size: 1.125em;
+
+  display: none;
+  border-block-end: 0;
+  min-width: 0;
+  z-index: 3;
+
+  /* Tools Campfire doesn't offer, matching the Trix toolbar: underline,
+     color highlights, tables, dividers and undo/redo (history tools were
+     hidden under Trix as well) */
+  button[name="underline"],
+  button[name="table"],
+  button[name="divider"],
+  button[name="undo"],
+  button[name="redo"],
+  lexxy-highlight-dropdown {
+    display: none !important;
+  }
+
+  /* No group separator pipes, like the Trix toolbar */
+  .lexxy-editor__toolbar-button.lexxy-editor__toolbar-group-end::after {
+    display: none;
+  }
+
+  /* Dropdown panels: a solid surface with a uniform radius. Lexxy derives
+     the panel's radius and gap from --lexxy-toolbar-gap, which Campfire
+     repurposes for button spacing */
+  .lexxy-editor__toolbar-dropdown [data-dropdown-panel] {
+    --lexxy-color-canvas: var(--color-bg);
+    --lexxy-color-ink-lightest: var(--color-message-bg);
+    --lexxy-color-selected: var(--color-selected);
+    --lexxy-color-selected-hover: var(--color-message-bg);
+
+    border: 1px solid var(--color-border-dark);
+    border-radius: 0.5em;
+    gap: 0.25em;
+    padding: 0.25em;
+  }
+
+  .lexxy-editor__toolbar-dropdown > .lexxy-editor__toolbar-button[aria-expanded="true"] {
+    border-radius: var(--lexxy-radius);
  }
 }

-[data-trix-content-type~="application/vnd.actiontext.opengraph-embed"] {
-  * {
-    text-decoration: none;
-  }
+/* Attachment markup contains formatting whitespace that must not turn into
+   line breaks under the editor's white-space: pre-wrap */
+lexxy-editor action-text-attachment {
+  white-space: normal;
+}

-  trix-editor & {
+action-text-attachment[content-type~="application/vnd.campfire.mention"] {
+  display: inline-flex;
+  margin: 0;
+  padding: 0;
+  position: relative;
+}
+
+action-text-attachment[content-type~="application/vnd.actiontext.opengraph-embed"] {
+  lexxy-editor & {
    display: block;
    inline-size: fit-content;
    max-inline-size: 100%;
  }
-}

-.trix-button:not(.trix-button--remove) {
-  @media (any-hover: hover) {
-    &:where(:not(:active):hover) {
-      filter: brightness(0.9);
-      background-color: var(--color-bg);
+  /* No selection background — it peeks through the card's rounded corners.
+     The lexxy-editor prefix out-specifies Lexxy's own selection rule. */
+  lexxy-editor &.node--selected {
+    --lexxy-attachment-bg-color: transparent;
+  }
+
+  /* A prominent remove button on the card's top edge, horizontally
+     centered, like the Trix one. The lexxy-editor prefix out-specifies
+     Lexxy's own placement rules. */
+  lexxy-editor & lexxy-node-delete-button {
+    inset-block-start: 0;
+    inset-inline-start: 50%;
+    inset-inline-end: auto;
+    transform: translate(-50%, -50%);
+
+    .lexxy-floating-controls__group {
+      --button-size: 2.2em;
+
+      background-color: var(--color-negative);
+      border-radius: 50%;
+      color: white;
    }
  }
-
-  &:disabled {
-    opacity: 0.33;
-  }
 }

-trix-editor,
-.trix-content {
+.lexxy-content {
  pre {
    background-color: var(--color-bg) !important;
    border-radius: 0.5em;
@@ -179,11 +174,13 @@ trix-editor,
  blockquote {
    border: 0 solid var(--color-border-darker) !important;
    border-inline-start-width: var(--blockquote-border) !important;
+    font-style: normal;
    margin: 0 var(--blockquote-margin) !important;
    padding-inline-start: var(--blockquote-padding) !important;
  }

  cite {
+    display: block;
    margin-inline-start: calc(var(--blockquote-padding));
    font-style: normal;
    font-size: 0.8rem;
@@ -199,13 +196,14 @@ trix-editor,
    color: var(--color-link);
  }

-  ul,
+  /* The composer's mention menu is a list inside the editor too, and keeps Lexxy's own spacing */
+  ul:not(.lexxy-prompt-menu),
  ol {
    margin: 0 !important;
    padding: 0 !important;
  }

-  li {
+  li:not(.lexxy-prompt-menu__item) {
    margin: 0 0 0 var(--inline-space-double) !important;
    padding: 0 !important;
  }
@@ -33,7 +33,7 @@
  }
 }

-[data-trix-content-type~='application/vnd.campfire.mention'] {
+action-text-attachment[content-type~='application/vnd.campfire.mention'] {
  display: inline-flex;
  margin: 0;
  padding: 0;
@@ -100,16 +100,42 @@
  }

  .composer--rich-text {
-    trix-toolbar {
-      display: block;
+    lexxy-toolbar {
+      display: flex;
    }

-    trix-editor.input {
+    lexxy-editor.input {
      margin-block-start: var(--block-space-half);
    }
  }

-  .composer--edit trix-toolbar {
+  /* In the message composer the toolbar goes below the text, on the same
+     row as the surrounding action buttons, like the Trix toolbar did.
+     The edit composer keeps it on top. */
+  #composer.composer--rich-text lexxy-editor.input {
+    display: flex;
+    flex-direction: column;
+
+    /* Sit the toolbar row on the same baseline as the composer's round
+       buttons, which pull themselves down with negative margins */
+    margin-block-end: -0.25em;
+
+    .lexxy-editor__content {
+      order: -1;
+    }
+
+    lexxy-toolbar {
+      margin-block-start: 0.4em;
+
+      /* Dropdowns open upward — the toolbar sits at the bottom of the screen */
+      [data-dropdown-panel] {
+        inset-block-start: auto;
+        inset-block-end: 100%;
+      }
+    }
+  }
+
+  .composer--edit lexxy-toolbar {
    border-block-end: 1px solid var(--color-border);
    margin-inline: -0.8em;
    padding-inline: 0.3em;
@@ -117,6 +143,16 @@
  }
 }

+/* The editor's container-type prevents it from sizing the message bubble by
+   its content, so give the bubble the full available width while editing */
+.message__body:has(.composer--edit) {
+  inline-size: 100%;
+
+  .message__body-content--editing {
+    flex-grow: 1;
+  }
+}
+
 /* Typing indicator */
 .typing-indicator {
  inset-block-start: var(--indicator-position, 0.15rem);
@@ -1,5 +1,5 @@
-trix-editor,
-.trix-content {
+
+.lexxy-content {
  .og-embed {
    background: var(--color-bg);
    border: 1px solid var(--color-border-dark);
@@ -15,7 +15,7 @@ trix-editor,
      flex-direction: row;
    }

-    .cf-twitter-avatar & {
+    &.og-embed--twitter-avatar {
      flex-direction: row;
    }
  }
@@ -35,10 +35,11 @@ trix-editor,

  .og-embed__title {
    font-weight: 600;
-    text-decoration: underline;

+    /* Underline the link itself so the line is link-colored */
    a {
      color: var(--color-link);
+      text-decoration: underline;
    }
  }

@@ -53,7 +54,11 @@ trix-editor,
      inline-size: 15dvw;
    }

+    /* block-size/border-radius guard against Lexxy's 1em round avatar
+       styling for custom attachment images */
    > * {
+      block-size: auto;
+      border-radius: 0;
      object-position: top right;
      inline-size: 100%;
      object-fit: contain;
@@ -63,7 +68,7 @@ trix-editor,
      }
    }

-    .cf-twitter-avatar & {
+    .og-embed--twitter-avatar & {
      aspect-ratio: 1;
      border-radius: 50%;
      inline-size: 2lh;
@@ -537,7 +537,7 @@ img.message__attachment {
    padding: var(--content-padding-block) 0 var(--content-padding-block) var(--content-padding-inline);
    text-shadow: 0 0 3px var(--color-text-reversed);

-    .trix-content {
+    .lexxy-content {
      font-size: 2.4em;
      line-height: 1.4;
    }
@@ -0,0 +1,13 @@
+# Prepended onto Turbo::StreamsChannel. The subscriber names the channel it wants, so
+# authorizing room messages only in RoomMessagesChannel would leave the stock channel as
+# a way around it: same signed stream name, no membership check. Turn those names away
+# here and RoomMessagesChannel becomes the only door.
+module RoomStreamsAreAuthorized
+  def subscribed
+    if RoomMessagesChannel.guarded_stream?(verified_stream_name_from_params)
+      reject
+    else
+      super
+    end
+  end
+end
@@ -0,0 +1,55 @@
+# Authorizes the room message stream when the subscription is made, so that revoking a
+# membership actually stops delivery.
+#
+# Turbo's stock channel verifies only the signature on the stream name. That name carries
+# no expiry and no binding to a user, so one harvested while a member keeps working after
+# the membership is gone. Reconnecting makes it worse rather than better: revoking a
+# membership disconnects the user with reconnect: true, and the client then replays its
+# subscriptions on the fresh socket.
+#
+# The room is derived from the verified stream name rather than taken as a parameter, so
+# there's nothing for a subscriber to point somewhere else. The subscriber also doesn't
+# get to choose the channel: Turbo::StreamsChannel turns these stream names away, so this
+# is the only way onto them. See config/initializers/turbo_streams_authorization.rb.
+class RoomMessagesChannel < ApplicationCable::Channel
+  extend  Turbo::Streams::StreamName
+  include Turbo::Streams::StreamName::ClassMethods
+
+  STREAM_SUFFIX = "messages"
+
+  class << self
+    # True for the stream names this channel exists to guard, whoever is asking.
+    def guarded_stream?(stream_name)
+      stream_name.to_s.split(":", 2).second == STREAM_SUFFIX
+    end
+
+    def subscribable_room(user, stream_name)
+      gid_param, suffix = stream_name.to_s.split(":", 2)
+
+      if suffix == STREAM_SUFFIX && room = room_from(gid_param)
+        user.rooms.find_by(id: room.id)
+      end
+    end
+
+    private
+      def room_from(gid_param)
+        GlobalID::Locator.locate gid_param, only: Room
+      rescue ActiveRecord::RecordNotFound
+        nil
+      end
+  end
+
+  def subscribed
+    if stream_name = authorized_stream_name
+      stream_from stream_name
+    else
+      reject
+    end
+  end
+
+  private
+    def authorized_stream_name
+      stream_name = verified_stream_name_from_params
+      stream_name if stream_name.present? && self.class.subscribable_room(current_user, stream_name)
+    end
+end
@@ -1,5 +1,12 @@
 class UnreadRoomsChannel < ApplicationCable::Channel
+  # Scoped per user, like ReadRoomsChannel. A single global stream would tell every
+  # authenticated connection when any room on the account is active, including closed
+  # rooms and direct conversations they're not part of.
+  def self.stream_name_for(user_id)
+    "user_#{user_id}_unreads"
+  end
+
  def subscribed
-    stream_from "unread_rooms"
+    stream_from self.class.stream_name_for(current_user.id)
  end
 end
@@ -8,9 +8,8 @@ class Accounts::LogosController < ApplicationController
    if stale?(etag: Current.account)
      expires_in 5.minutes, public: true, stale_while_revalidate: 1.week

-      if Current.account&.logo&.attached?
-        logo = Current.account.logo.variant(logo_variant).processed
-        send_png_file ActiveStorage::Blob.service.path_for(logo.key)
+      if (logo_variant = Current.account&.logo_variant(logo_size))
+        send_png_file ActiveStorage::Blob.service.path_for(logo_variant.key)
      else
        send_stock_icon
      end
@@ -23,9 +22,6 @@ class Accounts::LogosController < ApplicationController
  end

  private
-    LARGE_SQUARE_PNG_VARIANT = { resize_to_limit: [ 512, 512 ], format: :png }
-    SMALL_SQUARE_PNG_VARIANT = { resize_to_limit: [ 192, 192 ], format: :png }
-
    def send_png_file(path)
      send_file path, content_type: "image/png", disposition: :inline
    end
@@ -38,8 +34,8 @@ class Accounts::LogosController < ApplicationController
      end
    end

-    def logo_variant
-      small_logo? ? SMALL_SQUARE_PNG_VARIANT : LARGE_SQUARE_PNG_VARIANT
+    def logo_size
+      small_logo? ? :small : :large
    end

    def small_logo?
@@ -1,11 +1,26 @@
 class Autocompletable::UsersController < ApplicationController
  def index
    set_page_and_extract_portion_from find_autocompletable_users.with_attached_avatar.ordered, per_page: 20
+
+    respond_to do |format|
+      format.html { render layout: false } # <lexxy-prompt-item> elements for the mentions prompt
+      format.json
+    end
  end

  private
    def find_autocompletable_users
-      params[:query].present? ? users_scope.active.filtered_by(params[:query]) : users_scope.active
+      if query.present?
+        users_scope.active.filtered_by(query)
+      else
+        users_scope.active
+      end
+    end
+
+    # The rich text editor's mentions prompt filters with `filter`, the
+    # autocomplete inputs with `query`
+    def query
+      params[:filter].presence || params[:query].presence
    end

    def users_scope
@@ -0,0 +1,9 @@
+module ActiveStorageAuthentication
+  extend ActiveSupport::Concern
+  include Authentication::SessionLookup
+
+  private
+    def require_active_storage_authentication
+      head :unauthorized unless find_session_by_cookie
+    end
+end
@@ -71,6 +71,13 @@ module Authentication
      Current.session&.destroy!
      reset_session
      remove_authentication_cookie
+      disconnect_remote_connections
+    end
+
+    def disconnect_remote_connections
+      Current.user&.reset_remote_connections
+    rescue => error
+      Rails.logger.warn "Could not disconnect remote connections on sign out: #{error.class}"
    end

    def authenticated_as(session)
@@ -0,0 +1,12 @@
+module RawRequestBody
+  extend ActiveSupport::Concern
+
+  private
+
+  def raw_request_body
+    request.body.rewind
+    request.body.read.force_encoding("UTF-8")
+  ensure
+    request.body.rewind
+  end
+end
@@ -0,0 +1,39 @@
+class Messages::Boosts::ByBotsController < Messages::BoostsController
+  include RawRequestBody
+
+  allow_bot_access only: %i[ create destroy ]
+
+  before_action :ensure_content_present, only: :create
+
+  def create
+    @boost = @message.boosts.create!(boost_params)
+
+    broadcast_create
+    render :show, status: :created
+  end
+
+  private
+    def set_message
+      if room = Current.user.rooms.find_by(id: params[:room_id])
+        @message = room.messages.find_by(id: params[:message_id])
+      end
+
+      head :not_found unless @message
+    end
+
+    def set_boost
+      super
+    rescue ActiveRecord::RecordNotFound
+      head :not_found
+    end
+
+    def ensure_content_present
+      if raw_request_body.blank?
+        head :unprocessable_content
+      end
+    end
+
+    def boost_params
+      { content: raw_request_body }
+    end
+end
@@ -1,5 +1,6 @@
 class Messages::BoostsController < ApplicationController
  before_action :set_message
+  before_action :set_boost, only: :destroy

  def index
  end
@@ -15,7 +16,6 @@ class Messages::BoostsController < ApplicationController
  end

  def destroy
-    @boost = Current.user.boosts.find(params[:id])
    @boost.destroy!

    broadcast_remove
@@ -26,6 +26,10 @@ class Messages::BoostsController < ApplicationController
      @message = Current.user.reachable_messages.find(params[:message_id])
    end

+    def set_boost
+      @boost = @message.boosts.find_by!(id: params[:id], booster: Current.user)
+    end
+
    def boost_params
      params.require(:boost).permit(:content)
    end
@@ -1,24 +1,64 @@
 class Messages::ByBotsController < MessagesController
-  allow_bot_access only: :create
+  include RawRequestBody
+
+  allow_bot_access only: %i[ index create update destroy ]
+
+  before_action :set_room
+  before_action :set_message, only: %i[ update destroy ]
+  before_action :ensure_can_administer, only: %i[ update destroy ]
+  before_action :ensure_body_or_attachment_present, only: :create
+
+  def index
+    @messages = find_paged_messages
+    set_pagination_headers
+  end

  def create
    super
    head :created, location: message_url(@message)
  end

+  def destroy
+    super
+    head :no_content
+  end
+
  private
+    def set_room
+      @room = Current.user.rooms.find_by(id: params[:room_id])
+
+      head :not_found unless @room
+    end
+
+    def ensure_body_or_attachment_present
+      if params[:attachment].blank? && raw_request_body.blank?
+        head :unprocessable_content
+      end
+    end
+
+    def set_pagination_headers
+      headers["X-Total-Count"] = @room.messages.count.to_s
+
+      if next_page = next_page_params
+        headers["Link"] = %(<#{room_bot_messages_url(@room, params[:bot_key], **next_page)}>; rel="next")
+      end
+    end
+
+    def next_page_params
+      if @messages.any?
+        if params[:after].present?
+          { after: @messages.last.id } if @room.messages.after(@messages.last).exists?
+        else
+          { before: @messages.first.id } if @room.messages.before(@messages.first).exists?
+        end
+      end
+    end
+
    def message_params
      if params[:attachment]
        params.permit(:attachment)
      else
-        reading(request.body) { |body| { body: body } }
+        { body: raw_request_body }
      end
    end
-
-    def reading(io)
-      io.rewind
-      yield io.read.force_encoding("UTF-8")
-    ensure
-      io.rewind
-    end
 end
@@ -37,7 +37,11 @@ class MessagesController < ApplicationController
    @message.update!(message_params)

    @message.broadcast_replace_to @room, :messages, target: [ @message, :presentation ], partial: "messages/presentation", attributes: { maintain_scroll: true }
-    redirect_to room_message_url(@room, @message)
+
+    respond_to do |format|
+      format.html { redirect_to room_message_url(@room, @message) }
+      format.json { render :show }
+    end
  end

  def destroy
@@ -58,11 +62,11 @@ class MessagesController < ApplicationController
    def find_paged_messages
      case
      when params[:before].present?
-        @room.messages.with_creator.page_before(@room.messages.find(params[:before]))
+        @room.messages.with_presentation.page_before(@room.messages.find(params[:before]))
      when params[:after].present?
-        @room.messages.with_creator.page_after(@room.messages.find(params[:after]))
+        @room.messages.with_presentation.page_after(@room.messages.find(params[:after]))
      else
-        @room.messages.with_creator.last_page
+        @room.messages.with_presentation.last_page
      end
    end

@@ -42,6 +42,12 @@ class Rooms::ClosedsController < RoomsController
      @room = @room.becomes!(Rooms::Closed)
    end

+    # Open and closed rooms convert into each other, so both are in reach here. Direct
+    # rooms never are: converting one would let its creator revise who's in it.
+    def room_scope
+      Current.user.rooms.without_directs
+    end
+
    def grantees
      User.where(id: grantee_ids)
    end
@@ -29,8 +29,13 @@ class Rooms::DirectsController < RoomsController
      end
    end

-    # All users in a direct room can administer it
+    # All users in a direct room can administer it. Only direct rooms, though: this
+    # relaxation is why room_scope below has to keep every other type out of reach.
    def ensure_can_administer
      true
    end
+
+    def room_scope
+      Current.user.rooms.directs
+    end
 end
@@ -40,6 +40,12 @@ class Rooms::OpensController < RoomsController
      @room = @room.becomes!(Rooms::Open)
    end

+    # Open and closed rooms convert into each other, so both are in reach here. Direct
+    # rooms never are: promoting one would republish its history to the whole account.
+    def room_scope
+      Current.user.rooms.without_directs
+    end
+
    def broadcast_create_room(room)
      broadcast_prepend_to :rooms, target: :shared_rooms, partial: "users/sidebars/rooms/shared", locals: { room: room }
    end
@@ -4,8 +4,8 @@ class Rooms::RefreshesController < ApplicationController
  before_action :set_last_updated_at

  def show
-    @new_messages = @room.messages.with_creator.page_created_since(@last_updated_at)
-    @updated_messages = @room.messages.without(@new_messages).with_creator.page_updated_since(@last_updated_at)
+    @new_messages = @room.messages.with_presentation.page_created_since(@last_updated_at)
+    @updated_messages = @room.messages.without(@new_messages).with_presentation.page_updated_since(@last_updated_at)
  end

  private
@@ -20,13 +20,19 @@ class RoomsController < ApplicationController

  private
    def set_room
-      if room = Current.user.rooms.find_by(id: params[:room_id] || params[:id])
+      if room = room_scope.find_by(id: params[:room_id] || params[:id])
        @room = room
      else
        redirect_to root_url, alert: "Room not found or inaccessible"
      end
    end

+    # Subclasses narrow this to the room types they're allowed to act on, so that one
+    # room namespace can't be used to reach another's rooms.
+    def room_scope
+      Current.user.rooms
+    end
+
    def ensure_can_administer
      head :forbidden unless Current.user.can_administer?(@room)
    end
@@ -38,9 +44,9 @@ class RoomsController < ApplicationController
    end

    def find_messages
-      messages = @room.messages.with_creator.with_attachment_details.with_boosts
+      messages = @room.messages.with_presentation

-      if show_first_message = messages.find_by(id: params[:message_id])
+      if params[:message_id].present? && (show_first_message = messages.find_by(id: params[:message_id]))
        @messages = messages.page_around(show_first_message)
      else
        @messages = messages.last_page
@@ -20,7 +20,7 @@ class SearchesController < ApplicationController
  private
    def set_messages
      if query.present?
-        @messages = Current.user.reachable_messages.search(query).last(100)
+        @messages = Current.user.reachable_messages.search(query).with_presentation.last_page_of(100)
      else
        @messages = Message.none
      end
@@ -9,8 +9,7 @@ class Users::AvatarsController < ApplicationController
    if stale?(etag: @user)
      expires_in 30.minutes, public: true, stale_while_revalidate: 1.week

-      if @user.avatar.attached?
-        avatar_variant = @user.avatar.variant(SQUARE_WEBP_VARIANT).processed
+      if (avatar_variant = @user.avatar_variant)
        send_webp_blob_file avatar_variant.key
      elsif @user.bot?
        render_default_bot
@@ -26,8 +25,6 @@ class Users::AvatarsController < ApplicationController
  end

  private
-    SQUARE_WEBP_VARIANT = { resize_to_limit: [ 512, 512 ], format: :webp }
-
    def send_webp_blob_file(key)
      send_file ActiveStorage::Blob.service.path_for(key), content_type: "image/webp", disposition: :inline
    end
@@ -6,12 +6,17 @@ class Users::PushSubscriptionsController < ApplicationController

  def create
    if subscription = @push_subscriptions.find_by(push_subscription_params)
-      subscription.touch
+      # Existing endpoints must pass current validations
+      if subscription.valid?
+        subscription.touch
+        head :ok
+      else
+        head :unprocessable_entity
+      end
    else
-      @push_subscriptions.create! push_subscription_params.merge(user_agent: request.user_agent)
+      subscription = @push_subscriptions.create push_subscription_params.merge(user_agent: request.user_agent)
+      head subscription.persisted? ? :ok : :unprocessable_entity
    end
-
-    head :ok
  end

  def destroy
@@ -2,18 +2,13 @@ class Users::SidebarsController < ApplicationController
  DIRECT_PLACEHOLDERS = 20

  def show
-    all_memberships     = Current.user.memberships.visible.with_ordered_room
-    @direct_memberships = extract_direct_memberships(all_memberships)
-    @other_memberships  = all_memberships.without(@direct_memberships)
+    @direct_memberships, @other_memberships = Current.user.memberships.visible.with_ordered_room.partition { |membership| membership.room.direct? }
+    @direct_memberships = @direct_memberships.sort_by { |membership| membership.room.updated_at }.reverse

    @direct_placeholder_users = find_direct_placeholder_users
  end

  private
-    def extract_direct_memberships(all_memberships)
-      all_memberships.select { |m| m.room.direct? }.sort_by { |m| m.room.updated_at }.reverse
-    end
-
    def find_direct_placeholder_users
      exclude_user_ids = user_ids_already_in_direct_rooms_with_current_user.including(Current.user.id)
      User.active.where.not(id: exclude_user_ids).order(:created_at).limit([ DIRECT_PLACEHOLDERS - exclude_user_ids.count, 0 ].max)
@@ -1,3 +1,13 @@
 module ContentFilters
-  TextMessagePresentationFilters = ActionText::Content::Filters.new(RemoveSoloUnfurledLinkText, StyleUnfurledTwitterAvatars, SanitizeTags)
+  # Formatting the rich text editor produces that Rails' sanitizers don't
+  # allow by default. A message passes through three sanitization layers on
+  # its way to the screen, and each builds on this list:
+  #
+  #   * SanitizeTags strips disallowed markup from the message body
+  #   * Action Text sanitizes the rendered content (lib/rails_ext/action_text_allowed_tags.rb)
+  #   * auto_link re-sanitizes the final html (MessagesHelper#message_presentation)
+  EDITOR_FORMATTING_TAGS = %w[ s u mark table thead tbody tfoot tr th td ]
+  EDITOR_FORMATTING_ATTRIBUTES = %w[ data-language ]
+
+  TextMessagePresentationFilters = ActionText::Content::Filters.new(RemoveSoloUnfurledLinkText, SanitizeTags, SanitizeAttributes)
 end
@@ -1,18 +1,22 @@
 class ContentFilters::RemoveSoloUnfurledLinkText < ActionText::Content::Filter
+  TWITTER_DOMAINS = %w[ x.com twitter.com ]
+  TWITTER_DOMAIN_MAPPING = { "x.com" => "twitter.com" }
+
  def applicable?
    normalize_tweet_url(solo_unfurled_url) == normalize_tweet_url(content.to_plain_text)
  end

  def apply
-    fragment.replace("div") { |node| node.tap { |n| n.inner_html = unfurled_links.first.to_s } }
+    if trix_body?
+      remove_link_text_from_wrapping_div
+    else
+      remove_link_paragraphs
+    end
  end

  private
-    TWITTER_DOMAINS = %w[ x.com twitter.com ]
-    TWITTER_DOMAIN_MAPPING = { "x.com" => "twitter.com" }
-
    def solo_unfurled_url
-      unfurled_links.first["href"] if unfurled_links.size == 1
+      ActionText::Attachment::OpengraphEmbed.from_node(unfurled_links.first)&.href if unfurled_links.size == 1
    end

    def unfurled_links
@@ -35,4 +39,20 @@ class ContentFilters::RemoveSoloUnfurledLinkText < ActionText::Content::Filter
    def twitter_url?(url)
      url.present? && TWITTER_DOMAINS.any? { |domain| url.strip.include?(domain) }
    end
+
+    def trix_body?
+      fragment.find_all("div").any?
+    end
+
+    def remove_link_text_from_wrapping_div
+      fragment.replace("div") { |node| node.tap { |n| n.inner_html = unfurled_links.first.to_s } }
+    end
+
+    def remove_link_paragraphs
+      fragment.replace("p") do |node|
+        if node.at_css("action-text-attachment")
+          node
+        end
+      end
+    end
 end
@@ -0,0 +1,47 @@
+class ContentFilters::SanitizeAttributes < ActionText::Content::Filter
+  def applicable?
+    true
+  end
+
+  # Scrub attributes on the tags that SanitizeTags allows, using Rails' safe-list
+  # sanitizer so unsafe URI schemes and event-handler attributes are stripped.
+  # Runs after SanitizeTags, so passing the same allowed tags makes the tag pass
+  # a no-op and only attributes are scrubbed.
+  def apply
+    sanitizer.sanitize fragment.to_html, tags: allowed_tags, attributes: allowed_attributes
+  end
+
+  private
+    # Presentation styling relies on class attributes (e.g. unfurled link embeds),
+    # which the standard ActionText set doesn't include.
+    EXTRA_ALLOWED_ATTRIBUTES = %w[ class ]
+
+    # ActionText::ContentHelper.sanitizer is a single process-wide instance, and
+    # rails-html-sanitizer reuses one mutable permit scrubber that it reconfigures
+    # from the tags/attributes on every #sanitize call. Sharing it here would race
+    # our stricter tag set against ActionText's default rendering on concurrent
+    # requests, so use a dedicated instance of the same sanitizer class to keep the
+    # scrubber isolated.
+    def sanitizer
+      sanitizer_class.new
+    end
+
+    def sanitizer_class
+      ActionText::ContentHelper.sanitizer.class
+    end
+
+    def allowed_tags
+      ContentFilters::SanitizeTags::ALLOWED_TAGS
+    end
+
+    def allowed_attributes
+      standard_allowed_attributes + EXTRA_ALLOWED_ATTRIBUTES
+    end
+
+    # Mirrors ActionText::ContentHelper#sanitizer_allowed_attributes, which isn't
+    # exposed at the module level.
+    def standard_allowed_attributes
+      ActionText::ContentHelper.allowed_attributes ||
+        (sanitizer_class.allowed_attributes + ActionText::Attachment::ATTRIBUTES).to_a
+    end
+end
@@ -1,4 +1,8 @@
 class ContentFilters::SanitizeTags < ActionText::Content::Filter
+  ALLOWED_TAGS = %w[ a abbr acronym address b big blockquote br cite code dd del dfn div dl dt em h1 h2 h3 h4 h5 h6 hr i ins kbd li ol
+    p pre samp small span strong sub sup time tt ul var ] + ContentFilters::EDITOR_FORMATTING_TAGS +
+    [ ActionText::Attachment.tag_name, "figure", "figcaption" ]
+
  def applicable?
    true
  end
@@ -8,9 +12,6 @@ class ContentFilters::SanitizeTags < ActionText::Content::Filter
  end

  private
-    ALLOWED_TAGS = %w[ a abbr acronym address b big blockquote br cite code dd del dfn div dl dt em h1 h2 h3 h4 h5 h6 hr i ins kbd li ol
-      p pre samp small span strong sub sup time tt ul var ] + [ ActionText::Attachment.tag_name, "figure", "figcaption" ]
-
    def not_allowed_tags_css_selector
      ALLOWED_TAGS.map { |tag| ":not(#{tag})" }.join("")
    end
@@ -1,24 +0,0 @@
-class ContentFilters::StyleUnfurledTwitterAvatars < ActionText::Content::Filter
-  def applicable?
-    unfurled_twitter_avatars.present?
-  end
-
-  def apply
-    fragment.update do |source|
-      div = source.at_css("div")
-      div["class"] = UNFURLED_TWITTER_AVATAR_CSS_CLASS
-    end
-  end
-
-  private
-    UNFURLED_TWITTER_AVATAR_CSS_CLASS = "cf-twitter-avatar"
-    TWITTER_AVATAR_URL_PREFIX = "https://pbs.twimg.com/profile_images"
-
-    def unfurled_twitter_avatars
-      fragment.find_all("#{opengraph_css_selector}[url*='#{TWITTER_AVATAR_URL_PREFIX}']")
-    end
-
-    def opengraph_css_selector
-      "action-text-attachment[@content-type='#{ActionText::Attachment::OpengraphEmbed::OPENGRAPH_EMBED_CONTENT_TYPE}']"
-    end
-end
@@ -1,4 +1,9 @@
 module MessagesHelper
+  # auto_link re-sanitizes with Rails' default safe list, which lacks the
+  # formatting the rich text editor produces
+  AUTO_LINK_ALLOWED_TAGS = Rails::HTML5::SafeListSanitizer.allowed_tags + ContentFilters::EDITOR_FORMATTING_TAGS
+  AUTO_LINK_ALLOWED_ATTRIBUTES = Rails::HTML5::SafeListSanitizer.allowed_attributes + ContentFilters::EDITOR_FORMATTING_ATTRIBUTES
+
  def message_area_tag(room, &)
    tag.div id: "message-area", class: "message-area", contents: true, data: {
      controller: "messages presence drop-target",
@@ -57,7 +62,8 @@ module MessagesHelper
    when "sound"
      message_sound_presentation(message)
    else
-      auto_link h(ContentFilters::TextMessagePresentationFilters.apply(message.body.body)), html: { target: "_blank" }
+      auto_link h(ContentFilters::TextMessagePresentationFilters.apply(message.body.body)),
+        html: { target: "_blank" }, sanitize_options: { tags: AUTO_LINK_ALLOWED_TAGS, attributes: AUTO_LINK_ALLOWED_ATTRIBUTES }
    end
  rescue Exception => e
    Sentry.capture_exception(e, extra: { message: message })
@@ -1,11 +1,33 @@
 module RichTextHelper
  def rich_text_data_actions
-    default_actions =
-      "trix-change->typing-notifications#start keydown->composer#submitByKeyboard"
+    # submitByKeyboard runs in the capture phase so it can submit on Enter
+    # before the editor turns the keystroke into a newline
+    "lexxy:change->typing-notifications#start keydown->composer#submitByKeyboard:capture"
+  end

-    autocomplete_actions =
-      "trix-focus->rich-autocomplete#focus trix-change->rich-autocomplete#search trix-blur->rich-autocomplete#blur"
+  def mention_prompt_tag(room)
+    tag.lexxy_prompt trigger: "@", name: "mention", src: autocompletable_users_path(room_id: room.id),
+      "remote-filtering": true, "empty-results": "No matches"
+  end

-    [ default_actions, autocomplete_actions ].join(" ")
+  # The editor keeps an attachment's content as it finds it, so every
+  # attachment is rebuilt from its attachable before editing: a Trix-era
+  # embed carries its details as node attributes the editor doesn't
+  # round-trip, a mention edited under Trix carries the generic content type
+  # the editor doesn't permit, and a hand-written embed carries whatever
+  # markup the author put there.
+  def editable_body(message)
+    fragment = ActionText::Fragment.wrap(message.body.body_before_type_cast)
+
+    transformed = fragment.replace(ActionText::Attachment.tag_name) do |node|
+      attachment = ActionText::Attachment.from_node(node)
+
+      node.tap do |n|
+        n["content-type"] = attachment.attachable.attachable_content_type
+        n["content"] = render_action_text_attachment(attachment)
+      end
+    end
+
+    ActionText::RichText.new(body: transformed.to_html)
  end
 end
@@ -73,12 +73,12 @@ module RoomsHelper
    def composer_data_actions
      drag_and_drop_actions = "drop-target:drop@window->composer#dropFiles"

-      trix_attachment_actions =
-        "trix-file-accept->composer#preventAttachment refresh-room:online@window->composer#online"
+      attachment_actions =
+        "lexxy:file-accept->composer#preventAttachment refresh-room:online@window->composer#online"

      remaining_actions =
        "typing-notifications#stop paste->composer#pasteFiles turbo:submit-end->composer#submitEnd refresh-room:offline@window->composer#offline"

-      [ drop_target_actions, drag_and_drop_actions, trix_attachment_actions, remaining_actions ].join(" ")
+      [ drop_target_actions, drag_and_drop_actions, attachment_actions, remaining_actions ].join(" ")
    end
 end
@@ -1,6 +1,4 @@
 // Configure your import map in config/importmap.rb. Read more: https://github.com/rails/importmap-rails
 import "@hotwired/turbo-rails"
-import "trix"
-import "@rails/actiontext"
 import "initializers"
 import "controllers"
@@ -1,7 +1,7 @@
 import { Controller } from "@hotwired/stimulus"
 import FileUploader from "models/file_uploader"
 import { onNextEventLoopTick, nextFrame } from "helpers/timing_helpers"
-import { escapeHTML } from "helpers/dom_helpers"
+import { escapeHTML } from "helpers/string_helpers"

 export default class extends Controller {
  static classes = ["toolbar"]
@@ -12,11 +12,21 @@ export default class extends Controller {
  #files = []

  connect() {
+    this.#restoreDraft()
+
    if (!this.#usingTouchDevice) {
      onNextEventLoopTick(() => this.textTarget.focus())
    }
  }

+  saveDraft() {
+    if (this.textTarget.isBlank) {
+      localStorage.removeItem(this.#draftKey)
+    } else {
+      localStorage.setItem(this.#draftKey, this.textTarget.value)
+    }
+  }
+
  submit(event) {
    event.preventDefault()

@@ -44,21 +54,20 @@ export default class extends Controller {
  }

  replaceMessageContent(content) {
-    const editor = this.textTarget.editor
-
-    editor.recordUndoEntry("Format reply")
-    editor.setSelectedRange([0, editor.getDocument().toString().length])
-    editor.deleteInDirection("forward")
-    editor.insertHTML(content)
-    editor.setSelectedRange([editor.getDocument().toString().length - 1])
+    this.textTarget.value = content
+    this.textTarget.focus()
+    this.textTarget.selection.placeCursorAtTheEnd()
  }

  submitByKeyboard(event) {
+    if (event.key != "Enter" || this.textTarget.hasOpenPrompt) return
+
    const toolbarVisible = this.element.classList.contains(this.toolbarClass)
-    const metaEnter = event.key == "Enter" && (event.metaKey || event.ctrlKey)
-    const plainEnter = event.keyCode == 13 && !event.shiftKey && !event.isComposing
+    const metaEnter = event.metaKey || event.ctrlKey
+    const plainEnter = !event.shiftKey && !event.isComposing

    if (!this.#usingTouchDevice && (metaEnter || (plainEnter && !toolbarVisible))) {
+      event.stopPropagation()
      this.submit(event)
    }
  }
@@ -108,6 +117,19 @@ export default class extends Controller {
    this.fieldsTarget.disabled = true
  }

+  #restoreDraft() {
+    const draft = localStorage.getItem(this.#draftKey)
+
+    if (draft) {
+      this.textTarget.value = draft
+      this.textTarget.selection.placeCursorAtTheEnd()
+    }
+  }
+
+  get #draftKey() {
+    return `composer-draft-${this.roomIdValue}`
+  }
+
  get #usingTouchDevice() {
    return 'ontouchstart' in window || navigator.maxTouchPoints > 0 || navigator.msMaxTouchPoints > 0;
  }
@@ -126,7 +148,7 @@ export default class extends Controller {
  }

  #validInput() {
-    return this.textTarget.textContent.trim().length > 0
+    return !this.textTarget.isBlank
  }

  async #submitFiles() {
@@ -159,6 +181,7 @@ export default class extends Controller {

  #reset() {
    this.textTarget.value = ""
+    localStorage.removeItem(this.#draftKey)
  }

  #updateFileList() {
@@ -89,7 +89,7 @@ export default class extends Controller {
  }

  async editMyLastMessage() {
-    const editorEmpty = document.querySelector("#composer trix-editor").matches(":empty")
+    const editorEmpty = document.querySelector("#composer lexxy-editor").isBlank

    if (editorEmpty && this.#paginator.upToDate) {
      this.#myLastMessage?.querySelector(".message__edit-btn")?.click()
@@ -11,7 +11,7 @@ export default class extends Controller {
  }

  reply() {
-    const content = `<blockquote>${this.#bodyContent}</blockquote><cite>${this.authorTarget.innerHTML} ${this.#linkToOriginal}</cite><br>`
+    const content = `<blockquote>${this.#bodyContent}</blockquote><cite>${this.authorTarget.innerHTML} ${this.#linkToOriginal}</cite><p><br></p>`
    this.composerOutlet.replaceMessageContent(content)
  }

@@ -23,7 +23,7 @@ export default class extends Controller {
  }

  get #bodyContent() {
-    const body = this.bodyTarget.querySelector(".trix-content").cloneNode(true)
+    const body = this.bodyTarget.querySelector(".lexxy-content").cloneNode(true)
    return this.#stripMentionAttachments(this.#stripUnfurledAttachments(body)).innerHTML
  }

@@ -1,46 +0,0 @@
-import { Controller } from "@hotwired/stimulus"
-import MentionsAutocompleteHandler from "lib/autocomplete/mentions_autocomplete_handler"
-import { debounce } from "helpers/timing_helpers"
-
-export default class extends Controller {
-  static values = { url: String }
-
-  initialize() {
-    this.handlers = []
-    this.search = debounce(this.search.bind(this), 300)
-  }
-
-  connect() {
-    if (this.element == document.activeElement) {
-      this.#installHandlers()
-    }
-  }
-
-  focus(event) {
-    this.#installHandlers()
-  }
-
-  search(event) {
-    const content = this.editor.getDocument().toString()
-    const position = this.editor.getPosition()
-    this.handlers.forEach(handler => handler.updateWithContentAndPosition(content, position))
-  }
-
-  blur(event) {
-    this.#uninstallHandlers()
-  }
-
-  #installHandlers() {
-    this.#uninstallHandlers()
-    this.handlers = [ new MentionsAutocompleteHandler(this.element, this.urlValue) ]
-  }
-
-  #uninstallHandlers() {
-    this.handlers.forEach(handler => handler.destroy())
-    this.handlers = []
-  }
-
-  get editor() {
-    return this.element.editor
-  }
-}
@@ -0,0 +1,84 @@
+import { Controller } from "@hotwired/stimulus"
+import { post } from "@rails/request.js"
+import { escapeHTML, truncateString } from "helpers/string_helpers"
+
+const OPENGRAPH_EMBED_CONTENT_TYPE = "application/vnd.actiontext.opengraph-embed"
+
+const UNFURLED_TWITTER_AVATAR_CSS_CLASS = "og-embed--twitter-avatar"
+const TWITTER_AVATAR_URL_PREFIX = "https://pbs.twimg.com/profile_images"
+
+export default class extends Controller {
+  #abortController
+
+  disconnect() {
+    this.#abortController?.abort()
+  }
+
+  async unfurl(event) {
+    if (!this.element.permitsAttachmentContentType(OPENGRAPH_EMBED_CONTENT_TYPE)) return
+
+    const { url, insertBelowLink } = event.detail
+
+    const metadata = await this.#fetchOpengraphMetadata(url)
+
+    if (metadata) {
+      insertBelowLink(this.#opengraphEmbedHTML(metadata), { attachment: { contentType: OPENGRAPH_EMBED_CONTENT_TYPE } })
+    }
+  }
+
+  async #fetchOpengraphMetadata(url) {
+    this.#abortController?.abort()
+    this.#abortController = new AbortController()
+
+    try {
+      const response = await post("/unfurl_link", {
+        body: { url },
+        contentType: "application/json",
+        signal: this.#abortController.signal
+      })
+
+      if (response.ok && response.statusCode !== 204) {
+        const { title, url: href, image, description } = await response.json
+        if (title && href) return { title, href, image, description }
+      }
+    } catch {
+      // Ignore aborted and failed requests
+    }
+
+    return null
+  }
+
+  #opengraphEmbedHTML({ title, href, image, description }) {
+    return `<actiontext-opengraph-embed>
+      <div class="og-embed gap ${this.#embedClass(image)}">
+        <div class="og-embed__content">
+          <div class="og-embed__title">
+            <a href="${escapeHTML(href)}" rel="noreferrer" target="_blank">${escapeHTML(truncateString(title, 280))}</a>
+          </div>
+          <div class="og-embed__description">${escapeHTML(truncateString(description, 560))}</div>
+        </div>
+        ${this.#imageHTML(image)}
+      </div>
+    </actiontext-opengraph-embed>`
+  }
+
+  #embedClass(image) {
+    if (this.#isTwitterAvatar(image)) {
+      return UNFURLED_TWITTER_AVATAR_CSS_CLASS
+    } else {
+      return ""
+    }
+  }
+
+  #isTwitterAvatar(image) {
+    return Boolean(image) && image.startsWith(TWITTER_AVATAR_URL_PREFIX)
+  }
+
+  #imageHTML(image) {
+    if (image) {
+      return `<div class="og-embed__image"><img src="${escapeHTML(image)}" class="image center" alt="" /></div>`
+    } else {
+      return ""
+    }
+  }
+}
@@ -4,12 +4,6 @@ export function scrollToBottom(container) {
  container.scrollTop = container.scrollHeight
 }

-export function escapeHTML(html) {
-  const div = document.createElement("div")
-  div.textContent = html
-  return div.innerHTML
-}
-
 export function parseHTMLFragment(html) {
  const template = document.createElement("template")
  template.innerHTML = html
@@ -1,3 +1,5 @@
+const HTML_ESCAPES = { "&": "&amp;", "<": "&lt;", ">": "&gt;", "\"": "&quot;", "'": "&#39;" }
+
 export function truncateString(string, length, omission = "…") {
  if (string.length <= length) {
    return string
@@ -5,3 +7,7 @@ export function truncateString(string, length, omission = "…") {
    return string.slice(0, length - omission.length) + omission
  }
 }
+
+export function escapeHTML(string) {
+  return String(string ?? "").replace(/[&<>"']/g, character => HTML_ESCAPES[character])
+}
@@ -1,10 +1,19 @@
-import Unfurler from "lib/rich_text/unfurl/unfurler"
+import * as Lexxy from "lexxy"
+import CampfireRichTextExtension from "lib/rich_text/campfire_extension"

-// Support a `cite` block for attribution links
-Trix.config.blockAttributes.cite = {
-  tagName: "cite",
-  inheritable: false,
-}
+Lexxy.configure({
+  global: {
+    // Keep the content type of mention attachments (application/vnd.campfire.mention)
+    // that Campfire has used since its Trix days
+    attachmentContentTypeNamespace: "campfire",
+    extensions: [ CampfireRichTextExtension ]
+  },
+  default: {
+    // Campfire sends files as separate messages via the composer's own
+    // attach button, never through the editor
+    toolbar: { attachments: false },

-const unfurler = new Unfurler()
-unfurler.install()
+    // Trix offered a single heading level, rendered as h1
+    headings: [ "h1" ]
+  }
+})
@@ -120,7 +120,7 @@ export default class BaseAutocompleteHandler {

  #fetchAutocompletables(url) {
    if (url) {
-      return fetch(url, { as: "json" }).then(response => response.json())
+      return fetch(url, { headers: { Accept: "application/json" } }).then(response => response.json())
    } else {
      return Promise.resolve()
    }
@@ -1,48 +0,0 @@
-import BaseAutocompleteHandler from "lib/autocomplete/base_autocomplete_handler"
-import { PUNCTUATION_PATTERN } from "lib/autocomplete/constants"
-
-export default class extends BaseAutocompleteHandler {
-  get pattern() {
-    return new RegExp(`^@(.*?)(${PUNCTUATION_PATTERN.source}*)$`)
-  }
-
-  insertAutocompletable(autocompletable, range, terminator, options = {}) {
-    const attachment = this.#createAttachmentForAutocompletable(autocompletable)
-    this.#insertAttachmentAndTerminatorIntoEditorAtRange(attachment, terminator, range, options)
-  }
-
-  // Override to set selector's position relative to the cursor in the editor
-  getOffsetsAtPosition(position) {
-    return this.#getOffsetsFromEditorAtPosition(this.#editor, position)
-  }
-
-  #createAttachmentForAutocompletable(mentionable) {
-    const mention = `
-      <span class="mention" sgid=${mentionable.sgid}>
-        <img src="${mentionable.avatar_url}" class="avatar" alt="${mentionable.name}">
-        ${mentionable.name}
-      </span>
-    `
-
-    return new Trix.Attachment({
-      content: mention,
-      contentType: "application/vnd.campfire.mention",
-      sgid: mentionable.sgid
-    })
-  }
-
-  #insertAttachmentAndTerminatorIntoEditorAtRange(attachment, terminator, range) {
-    if (range) { this.#editor.setSelectedRange(range) }
-    this.#editor.insertAttachment(attachment)
-    this.#editor.insertString(terminator)
-  }
-
-  get #editor() {
-    return this.element.editor
-  }
-
-  #getOffsetsFromEditorAtPosition(editor, position) {
-    const rect = this.#editor.getClientRectAtPosition(position)
-    return rect ? rect : {}
-  }
-}
@@ -0,0 +1,24 @@
+import * as Lexxy from "lexxy"
+import CiteNode from "lib/rich_text/cite_node"
+
+export default class CampfireRichTextExtension extends Lexxy.Extension {
+  get allowedElements() {
+    return [
+      "cite",
+      "figure",
+      "figcaption",
+      "actiontext-opengraph-embed",
+      { tag: "div", attributes: [ "sgid" ] },
+      { tag: "span", attributes: [ "sgid" ] },
+      { tag: "img", attributes: [ "alt" ] },
+      { tag: "a", attributes: [ "rel", "target" ] }
+    ]
+  }
+
+  get lexicalExtension() {
+    return this.defineExtension({
+      name: "campfire/rich-text",
+      nodes: [ CiteNode ]
+    })
+  }
+}
@@ -0,0 +1,39 @@
+import * as Lexxy from "lexxy"
+
+const { ElementNode } = Lexxy.Lexical
+
+export default class CiteNode extends ElementNode {
+  static getType() {
+    return "cite"
+  }
+
+  static clone(node) {
+    return new CiteNode(node.__key)
+  }
+
+  static importJSON(serializedNode) {
+    return new CiteNode().updateFromJSON(serializedNode)
+  }
+
+  static importDOM() {
+    return {
+      cite: () => ({ conversion: () => ({ node: new CiteNode() }), priority: 1 })
+    }
+  }
+
+  exportJSON() {
+    return { ...super.exportJSON(), type: "cite" }
+  }
+
+  createDOM() {
+    return document.createElement("cite")
+  }
+
+  updateDOM() {
+    return false
+  }
+
+  exportDOM() {
+    return { element: document.createElement("cite") }
+  }
+}
@@ -1,80 +0,0 @@
-import { post } from "@rails/request.js"
-import { truncateString } from "helpers/string_helpers"
-
-const UNFURLED_TWITTER_AVATAR_CSS_CLASS = "cf-twitter-avatar"
-const TWITTER_AVATAR_URL_PREFIX = "https://pbs.twimg.com/profile_images"
-
-export default class OpengraphEmbedOperation {
-  constructor(paste) {
-    this.paste = paste
-    this.editor = this.paste.editor
-    this.url = this.paste.string
-
-    this.abortController = new AbortController()
-  }
-
-  perform() {
-    return this.#createOpenGraphMetadataRequest()
-      .then(response => response.json)
-      .then(this.#insertOpengraphAttachment.bind(this))
-      .catch(() => null)
-  }
-
-  abort() {
-    this.abortController.abort()
-  }
-
-  #createOpenGraphMetadataRequest() {
-    return post("/unfurl_link", {
-      body: { url: this.url },
-      contentType: "application/json",
-      signal: this.abortController.signal
-    })
-  }
-
-  #insertOpengraphAttachment(response) {
-    if (this.#shouldInsertOpengraphPreview) {
-      const currentRange = this.editor.getSelectedRange()
-      this.editor.setSelectedRange(this.editor.getSelectedRange())
-      this.editor.recordUndoEntry("Insert Opengraph preview for Pasted URL")
-      this.editor.insertAttachment(this.#createOpengraphAttachment(response))
-      this.editor.setSelectedRange(currentRange)
-    }
-  }
-
-  get #shouldInsertOpengraphPreview() {
-    return this.editor.getDocument().toString().includes(this.url)
-  }
-
-  #createOpengraphAttachment(response) {
-    const { title, url, image, description } = response
-    const html = this.#generateOpengraphEmbedHTML({ title, url, image, description })
-
-    return new Trix.Attachment({
-      contentType: "application/vnd.actiontext.opengraph-embed",
-      content: html,
-      filename: title,
-      href: url,
-      url: image,
-      caption: description
-    })
-  }
-
-  #generateOpengraphEmbedHTML(embed) {
-    return `<actiontext-opengraph-embed class="${this.#isTwitterAvatar(embed) ? UNFURLED_TWITTER_AVATAR_CSS_CLASS : ''}">
-      <div class="og-embed">
-        <div class="og-embed__content">
-          <div class="og-embed__title">${truncateString(embed.title, 560)}</div>
-          <div class="og-embed__description">${truncateString(embed.description, 560)}</div>
-        </div>
-        <div class="og-embed__image">
-          <img src="${embed.image}" class="image" alt="" />
-        </div>
-      </div>
-    </actiontext-opengraph-embed>`
-  }
-
-  #isTwitterAvatar(embed) {
-    return embed.image.startsWith(TWITTER_AVATAR_URL_PREFIX)
-  }
-}
@@ -1,39 +0,0 @@
-export default class Paste {
-  constructor(range, editor, document) {
-    this.range = range
-    this.editor = editor
-    this.document = document
-    if (this.document == null) { this.document = this.editor.getDocument() }
-    this.string = this.document.getStringAtRange(this.range)
-  }
-
-  isURL() {
-    return /^(?:[a-z0-9]+:\/\/|www\.)[^\s]+$/.test(this.string)
-  }
-
-  getPathname() {
-    const a = document.createElement("a")
-    a.href = this.string
-    return a.pathname
-  }
-
-  isLinked() {
-    const {href} = this.getCommonAttributes()
-    return (href != null) && (href !== this.string)
-  }
-
-  getCommonAttributes() {
-    return this.document.getCommonAttributesAtRange(this.range)
-  }
-
-  getSignificantPaste() {
-    return new this.constructor(this.getSignificantRange(), this.editor, this.document)
-  }
-
-  getSignificantRange() {
-    const significantString = this.string.trim()
-    const startOffset = this.range[0] + this.string.indexOf(significantString)
-    const endOffset = startOffset + significantString.length
-    return [startOffset, endOffset]
-  }
-}
@@ -1,59 +0,0 @@
-import OpengraphEmbedOperation from "lib/rich_text/unfurl/lib/opengraph_embed_operation"
-import Paste from "lib/rich_text/unfurl/lib/paste"
-
-const performOperation = (function() {
-  let operation = null
-  let requestId = null
-
-  return function(operationToPerform) {
-    operation?.abort()
-    cancelAnimationFrame(requestId)
-
-    requestId = requestAnimationFrame(function() {
-      operation = operationToPerform
-      operation.perform().then(() => operation = null)
-    })
-  }
-})()
-
-export default class Unfurler {
-  install() {
-    this.#addEventListeners()
-  }
-
-  #addEventListeners() {
-    addEventListener("trix-initialize", function(event) {
-      if (this.#editorElementPermitsAttribute(event.target, "href")) {
-        return event.target.addEventListener("trix-paste", this.#didPaste.bind(this))
-      }
-    }.bind(this))
-  }
-
-  #didPaste(event) {
-    const {range} = event.paste
-    const {editor} = event.target
-
-    if (range != null) {
-      const paste = new Paste(range, editor).getSignificantPaste()
-
-      if (paste.isURL()) {
-        if (this.#editorElementPermitsOpengraphAttachment(event.target)) {
-          performOperation(new OpengraphEmbedOperation(paste))
-        }
-      }
-    }
-  }
-
-  #editorElementPermitsAttribute(element, attributeName) {
-    if (element.hasAttribute("data-permitted-attributes")) {
-      return Array.from(element.getAttribute("data-permitted-attributes").split(" ")).includes(attributeName)
-    } else {
-      return true
-    }
-  }
-
-  #editorElementPermitsOpengraphAttachment(element) {
-    const permittedAttachmentTypes = element.getAttribute("data-permitted-attachment-types")
-    return permittedAttachmentTypes && permittedAttachmentTypes.includes("application/vnd.actiontext.opengraph-embed")
-  }
-}
@@ -18,7 +18,7 @@ export default class ClientMessage {
      body,
      messageTimestamp: Math.floor(now.getTime()),
      messageDatetime: now.toISOString(),
-      messageClasses: this.#containsOnlyEmoji(node.textContent) ? "message--emoji" : "",
+      messageClasses: this.#messageClassesFromNode(node),
    })
  }

@@ -52,26 +52,37 @@ export default class ClientMessage {
    }
  }

+  #messageClassesFromNode(node) {
+    if (this.#containsOnlyEmoji(this.#plainTextFromNode(node))) {
+      return "message--emoji"
+    } else {
+      return ""
+    }
+  }
+

  #isPlayCommand(node) {
    return this.#matchPlayCommand(node)
  }

  #matchPlayCommand(node) {
-    return this.#stripWrapperElement(node)?.match(new RegExp(`^/play (${SOUND_NAMES.join("|")})`))?.[1]
+    return this.#plainTextFromNode(node)?.match(new RegExp(`^/play (${SOUND_NAMES.join("|")})`))?.[1]
  }

-  #stripWrapperElement(node) {
-    return node.innerHTML?.replace(/<div>(?:<!--[\s\S]*?-->)*([\s\S]*?)<\/div>/i, '$1')
+  #plainTextFromNode(node) {
+    if (this.#isRichText(node)) {
+      return node.toString().trim()
+    } else {
+      return node
+    }
  }

-
  #isRichText(node) {
    return typeof(node) != "string"
  }

  #richTextContent(node) {
-    return `<div class="trix-content">${node.innerHTML}</div>`
+    return `<div class="lexxy-content">${node.value}</div>`
  }


@@ -76,7 +76,21 @@ export default class MessageFormatter {
  }

  #highlightCodeBlock(block) {
-    if (this.#isPlainText(block)) window.hljs.highlightElement(block)
+    this.#normalizeLineBreaks(block)
+
+    if (this.#isPlainText(block)) {
+      const language = block.dataset.language
+      if (language && window.hljs.getLanguage(language)) {
+        block.classList.add(`language-${language}`)
+      }
+
+      window.hljs.highlightElement(block)
+    }
+  }
+
+  // Lexxy breaks code block lines with <br>, Trix-era blocks used newlines
+  #normalizeLineBreaks(block) {
+    block.querySelectorAll("br").forEach(br => br.replaceWith("\n"))
  }

  #isPlainText(element) {
@@ -1,6 +1,14 @@
 class Account < ApplicationRecord
  include Joinable

-  has_one_attached :logo
+  has_one_attached :logo do |attachable|
+    attachable.variant :large, resize_to_limit: [ 512, 512 ], format: :png
+    attachable.variant :small, resize_to_limit: [ 192, 192 ], format: :png
+  end
+
  has_json :settings, restrict_room_creation_to_administrators: false
+
+  def logo_variant(size)
+    logo.variant(size).processed if logo.variable?
+  end
 end
@@ -14,11 +14,11 @@ class Message < ApplicationRecord
  scope :ordered, -> { order(:created_at) }
  scope :with_creator, -> { preload(creator: :avatar_attachment) }
  scope :with_attachment_details, -> {
-    with_rich_text_body_and_embeds
-    with_attached_attachment
+    with_rich_text_body_and_embeds.with_attached_attachment
      .includes(attachment_blob: :variant_records)
  }
-  scope :with_boosts, -> { includes(boosts: :booster) }
+  scope :with_boosts, -> { includes(boosts: { booster: :avatar_attachment }) }
+  scope :with_presentation, -> { with_creator.with_attachment_details.with_boosts.preload(:room) }

  def plain_text_body
    body.to_plain_text.presence || attachment&.filename&.to_s || ""
@@ -1,10 +1,21 @@
 module Message::Broadcasts
  def broadcast_create
    broadcast_append_to room, :messages, target: [ room, :messages ]
-    ActionCable.server.broadcast("unread_rooms", { roomId: room.id })
+    broadcast_unread_room
  end

  def broadcast_remove
    broadcast_remove_to room, :messages
  end
+
+  private
+    # Fanned out to the room's members rather than published on one global stream, so
+    # that the timing of activity in a room only reaches people who are in it.
+    def broadcast_unread_room
+      payload = ActiveSupport::JSON.encode(roomId: room.id)
+
+      room.memberships.pluck(:user_id).each do |user_id|
+        ActionCable.server.broadcast UnreadRoomsChannel.stream_name_for(user_id), payload, coder: nil
+      end
+    end
 end
@@ -3,9 +3,31 @@ module Message::Pagination

  PAGE_SIZE = 40

+  # Expose Rails' collection-preloading hook while preserving Array pagination and
+  # validators. The renderer passes only cache misses to preload_associations.
+  class Page < Array
+    def self.load(relation, direction, size)
+      new(relation.skip_preloading!.public_send(direction, size), relation)
+    end
+
+    def initialize(records, relation)
+      super(records)
+      @relation = relation
+    end
+
+    def loaded?
+      true
+    end
+
+    def preload_associations(records)
+      @relation.preload_associations(records)
+    end
+  end
+
  included do
-    scope :last_page, -> { ordered.last(PAGE_SIZE) }
-    scope :first_page, -> { ordered.first(PAGE_SIZE) }
+    # Keep presentation data lazy until the collection cache knows which messages missed.
+    scope :last_page, -> { last_page_of(PAGE_SIZE) }
+    scope :first_page, -> { Page.load(ordered, :first, PAGE_SIZE) }

    scope :before, ->(message) { where("created_at < ?", message.created_at) }
    scope :after, ->(message) { where("created_at > ?", message.created_at) }
@@ -18,8 +40,12 @@ module Message::Pagination
  end

  class_methods do
+    def last_page_of(size)
+      Page.load(ordered, :last, size)
+    end
+
    def page_around(message)
-      page_before(message) + [ message ] + page_after(message)
+      Page.new(page_before(message) + [ message ] + page_after(message), ordered)
    end

    def paged?
@@ -6,7 +6,15 @@ module Message::Searchable
    after_update_commit  :update_in_index
    after_destroy_commit :remove_from_index

-    scope :search, ->(query) { joins("join message_search_index idx on messages.id = idx.rowid").where("idx.body match ?", query).ordered }
+    scope :search, ->(query) { joins("join message_search_index idx on messages.id = idx.rowid").where("idx.body match ?", match_terms(query)).ordered }
+  end
+
+  class_methods do
+    # Quotes each word, so that FTS5 searches for AND, OR, NOT and NEAR rather than
+    # parsing them as operators, which fails on a query like "AND" or "salt AND".
+    def match_terms(query)
+      query.split.map { |word| %("#{word.gsub('"', '""')}") }.join(" ")
+    end
  end

  private
@@ -1,7 +1,61 @@
+require "restricted_http/private_network_guard"
+
 class Push::Subscription < ApplicationRecord
+  PERMITTED_ENDPOINT_HOSTS = %w[
+    jmt17.google.com
+    fcm.googleapis.com
+    updates.push.services.mozilla.com
+    web.push.apple.com
+    notify.windows.com
+  ].freeze
+
  belongs_to :user

+  validates :endpoint, presence: true
+  validate :validate_endpoint_url
+
  def notification(**params)
-    WebPush::Notification.new(**params, badge: user.memberships.unread.count, endpoint: endpoint, p256dh_key: p256dh_key, auth_key: auth_key)
+    # Defer DNS lookup to the delivery worker to prevent rebinding
+    WebPush::Notification.new(**params, badge: user.memberships.unread.count, endpoint: endpoint, endpoint_ip_resolver: method(:resolved_endpoint_ip), p256dh_key: p256dh_key, auth_key: auth_key)
  end
+
+  # Validate at point of use, not just when saved.
+  def resolved_endpoint_ip
+    RestrictedHTTP::PrivateNetworkGuard.resolve(endpoint_uri.host) if permitted_endpoint_uri?
+  rescue RestrictedHTTP::Violation, Surfguard::Unresolvable
+    nil
+  end
+
+  private
+    # Validate endpoint shape. Belt & suspenders.
+    def permitted_endpoint_uri?
+      endpoint_uri&.scheme == "https" && endpoint_uri.port == 443 && permitted_endpoint_host?
+    end
+
+    def endpoint_uri
+      URI.parse(endpoint) if endpoint.present?
+    rescue URI::InvalidURIError
+      nil
+    end
+
+    def validate_endpoint_url
+      if endpoint_uri.nil?
+        errors.add(:endpoint, "is not a valid URL")
+      elsif endpoint_uri.scheme != "https"
+        errors.add(:endpoint, "must use HTTPS")
+      elsif endpoint_uri.port != 443
+        errors.add(:endpoint, "must use the default HTTPS port")
+      elsif !permitted_endpoint_host?
+        errors.add(:endpoint, "is not a permitted push service")
+      elsif resolved_endpoint_ip.nil?
+        errors.add(:endpoint, "resolves to a private or invalid IP address")
+      end
+    end
+
+    def permitted_endpoint_host?
+      host = endpoint_uri&.host&.downcase
+      host.present? && PERMITTED_ENDPOINT_HOSTS.any? do |permitted|
+        host == permitted || host.end_with?(".#{permitted}")
+      end
+    end
 end
@@ -22,6 +22,8 @@ class Room < ApplicationRecord

  belongs_to :creator, class_name: "User", default: -> { Current.user }

+  validate :direct_rooms_keep_their_type, on: :update
+
  scope :opens,           -> { where(type: "Rooms::Open") }
  scope :closeds,         -> { where(type: "Rooms::Closed") }
  scope :directs,         -> { where(type: "Rooms::Direct") }
@@ -65,6 +67,15 @@ class Room < ApplicationRecord
  end

  private
+    # Open and closed rooms convert into each other freely. A direct room can't become
+    # either: its participants agreed to a private conversation, not to one whose
+    # audience someone else gets to widen afterwards.
+    def direct_rooms_keep_their_type
+      if type_changed? && type_was == "Rooms::Direct"
+        errors.add :type, "can't be changed for a direct room"
+      end
+    end
+
    def unread_memberships(message)
      memberships.visible.disconnected.where.not(user: message.creator).update_all(unread_at: message.created_at, updated_at: Time.current)
    end
@@ -2,7 +2,9 @@ module User::Avatar
  extend ActiveSupport::Concern

  included do
-    has_one_attached :avatar
+    has_one_attached :avatar do |attachable|
+      attachable.variant :square, resize_to_limit: [ 512, 512 ], format: :webp
+    end
  end

  class_methods do
@@ -14,4 +16,8 @@ module User::Avatar
  def avatar_token
    signed_id(purpose: :avatar)
  end
+
+  def avatar_variant
+    avatar.variant(:square).processed if avatar.variable?
+  end
 end
@@ -1,11 +1,13 @@
 module User::Mentionable
  include ActionText::Attachable

-  def to_attachable_partial_path
-    "users/mention"
+  MENTION_CONTENT_TYPE = "application/vnd.campfire.mention"
+
+  def attachable_content_type
+    MENTION_CONTENT_TYPE
  end

-  def to_trix_content_attachment_partial_path
+  def to_attachable_partial_path
    "users/mention"
  end

@@ -24,6 +24,8 @@ class Webhook < ApplicationRecord
        Net::HTTP::Post.new(uri, "Content-Type" => "application/json").tap { |request| request.body = payload }
    end

+    # No PrivateNetworkGuard, unlike Opengraph::Fetch: only an administrator sets this URL,
+    # and operators legitimately point bots at their own internal services.
    def http
      Net::HTTP.new(uri.host, uri.port).tap do |http|
        http.use_ssl = (uri.scheme == "https")
@@ -1,11 +1,11 @@
 <figure class="attachment attachment--content attachment--og">
  <actiontext-opengraph-embed>
-    <div class="og-embed gap">
+    <div class="og-embed gap <%= "og-embed--twitter-avatar" if opengraph_embed.twitter_avatar? %>">
      <div class="og-embed__content">
        <div class="og-embed__title">
-          <%= link_to truncate(opengraph_embed.filename, length: 280, omission: "…"), opengraph_embed.href, rel: "noreferrer", target: "_blank" %>
+          <%= link_to_if opengraph_embed.href.present?, truncate(opengraph_embed.filename, length: 280, omission: "…"), opengraph_embed.href, rel: "noreferrer", target: "_blank" %>
        </div>
-        <div class="og-embed__description"><%= truncate(opengraph_embed.caption, length: 560, omission: "…").html_safe %></div>
+        <div class="og-embed__description"><%= truncate(opengraph_embed.description.to_s, length: 560, omission: "…") %></div>
      </div>
      <% if opengraph_embed.url %>
        <div class="og-embed__image">
@@ -0,0 +1,11 @@
+<lexxy-prompt-item search="<%= user.name %>" sgid="<%= user.attachable_sgid %>">
+  <template type="menu">
+    <span class="autocomplete__item flex align-center gap unpad">
+      <%= avatar_tag user %>
+      <span class="autocompletable__name"><%= user.name %></span>
+    </span>
+  </template>
+  <template type="editor">
+    <%= render "users/mention", user: user %>
+  </template>
+</lexxy-prompt-item>
@@ -0,0 +1 @@
+<%= render partial: "autocompletable/users/prompt_item", collection: @page.records, as: :user %>
@@ -1,3 +1,3 @@
-<div class="trix-content">
+<div class="lexxy-content">
  <%= yield -%>
 </div>
@@ -1,6 +1,7 @@
 <%# Be sure to check/update messages/_template.html.erb when changing this file %>

-<% cache message do %>
+<%# Bump this version when the message presentation filters change what they emit. Editing this line changes the template digest, which busts BOTH this fragment cache and the collection cache that keys on this partial's digest (helper Ruby changes alone don't). %>
+<% cache [ message, "presentation-v3" ] do %>
  <%= message_tag message do %>
    <h2 class="message__day-separator"><%= local_datetime_tag message.created_at, style: :date %></h2>

@@ -0,0 +1,18 @@
+json.cache! message do
+  json.(message, :id)
+
+  json.created_at message.created_at.utc
+
+  json.body do
+    json.plain_text message.plain_text_body
+    json.html message.body.to_s
+  end
+
+  json.creator message.creator, partial: "users/user", as: :user
+
+  json.room do
+    json.id message.room_id
+  end
+
+  json.url room_message_url(message.room, message)
+end
@@ -0,0 +1,12 @@
+json.cache! boost do
+  json.(boost, :id, :content)
+
+  json.created_at boost.created_at.utc
+
+  json.booster boost.booster, partial: "users/user", as: :user
+
+  json.message do
+    json.id boost.message_id
+    json.url room_message_url(boost.message.room, boost.message)
+  end
+end
@@ -7,7 +7,7 @@

    <%= turbo_frame_tag message, :new_boost do %>
      <div class="flex-inline message__boost-inline" data-controller="soft-keyboard">
-        <%= link_to new_message_boost_path(message), class: "boost__action txt-small btn", action: "soft-keyboard#open" do %>
+        <%= link_to new_message_boost_path(message), class: "boost__action txt-small btn", data: { action: "soft-keyboard#open" } do %>
          <%= image_tag "boost.svg", size: 20, aria: { hidden: "true" } %>
          <span class="for-screen-reader">Add a boost</span>
        <% end %>
@@ -0,0 +1 @@
+json.partial! "messages/boosts/boost", boost: @boost
@@ -0,0 +1 @@
+json.array! @messages, partial: "messages/message", as: :message
@@ -0,0 +1 @@
+json.partial! "messages/message", message: @message
@@ -14,17 +14,18 @@
      <% else %>
        <div class="composer--edit composer--rich-text">
          <%= form_with model: @message, url: room_message_path(@room, @message), id: dom_id(@message, :form), data: {
-                controller: "form", action: "trix-file-accept->form#preventAttachment keydown.esc->form#cancel keydown.ctrl+enter->form#submit:prevent keydown.meta+enter->form#submit:prevent" } do |form| %>
+                controller: "form", action: "lexxy:file-accept->form#preventAttachment keydown.esc->form#cancel keydown.ctrl+enter->form#submit:prevent keydown.meta+enter->form#submit:prevent" } do |form| %>
            <div class="full-width input input--actor min-width fill-white">
              <%= form.rich_text_area :body,
+                    value: editable_body(@message),
                    rows: 1,
-                    class: "input",
+                    class: "input lexxy-content",
                    aria: { multiline: "true", label: "Edit message" },
                    autofocus: true,
-                    data: {
-                      controller: "rich-autocomplete",
-                      action: rich_text_data_actions,
-                      rich_autocomplete_url_value: autocompletable_users_path(room_id: @room.id) } %>
+                    "permitted-attachment-types": "application/vnd.campfire.mention application/vnd.actiontext.opengraph-embed",
+                    data: { action: rich_text_data_actions } do %>
+                <%= mention_prompt_tag @room %>
+              <% end %>
            </div>

            <%= link_to "Close editor and discard changes", room_message_path(@room, @message), data: { form_target: "cancel" }, hidden: true %>
@@ -17,7 +17,7 @@
    <%= render partial: "messages/message", collection: @messages, cached: true %>
  <% end %>

-  <%= turbo_stream_from @room, :messages %>
+  <%= turbo_stream_from @room, :messages, channel: "RoomMessagesChannel" %>
  <%= button_to_jump_to_newest_message %>
 <% end %>

@@ -19,15 +19,16 @@
                <div class="flex flex-column flex-item-grow min-width gap">
                  <%= form.rich_text_area :body,
                        rows: 1,
-                        class: "input",
+                        class: "input lexxy-content",
                        style: "order: -1",
                        aria: { multiline: "true", label: "Write a message" },
+                        "permitted-attachment-types": "application/vnd.campfire.mention application/vnd.actiontext.opengraph-embed",
                        data: {
-                          controller: "rich-autocomplete",
-                          action: rich_text_data_actions,
-                          rich_autocomplete_url_value: autocompletable_users_path(room_id: room.id),
-                          permitted_attachment_types: "application/vnd.actiontext.opengraph-embed",
-                          composer_target: "text" } %>
+                          controller: "unfurl",
+                          action: "#{rich_text_data_actions} lexxy:change->composer#saveDraft lexxy:insert-link->unfurl#unfurl",
+                          composer_target: "text" } do %>
+                    <%= mention_prompt_tag room %>
+                  <% end %>
                </div>

                <label class="btn btn--borderless txt-small flex-item-no-shrink composer__attachment-btn input--file">
@@ -54,7 +54,7 @@
  </div>

  <%= search_results_tag do %>
-    <%= render @messages %>
+    <%= render partial: "messages/message", collection: @messages, cached: true %>
  <% end %>
 </div>

@@ -1,4 +1,4 @@
-<div class="mention" sgid="<%= user.attachable_sgid %>">
-  <%= avatar_tag user %>
-  <%= user.name %>
-</div>
+<%# A span rather than a div: mentions render inline inside the <p> paragraphs
+    the editor produces, and block elements would make the browser split the
+    paragraph when parsing %>
+<span class="mention" sgid="<%= user.attachable_sgid %>"><%= avatar_tag user %> <%= user.name %></span>
@@ -0,0 +1,5 @@
+json.cache! user do
+  json.(user, :id, :name, :role)
+
+  json.avatar_url fresh_user_avatar_url(user)
+end
@@ -0,0 +1,26 @@
+# Message benchmarks
+
+The drivers use Ruby's standard library and Docker; no separate load generator is required.
+Provide a frozen baseline source directory, an isolated seed containing `db/`, `storage/`
+and `labels.json`, and a matching application image with compiled assets.
+
+```sh
+ruby bench/compare_message_hot_paths.rb --baseline PATH --baseline-ref SHA --seed SEED
+ruby bench/compare_http.rb --baseline PATH --seed SEED
+ruby bench/compare_http.rb --baseline PATH --seed SEED --paths sidebar,search --concurrencies 16 --duration 10
+```
+
+Both drivers alternate before/after order and reset fixture storage for each run.
+Results default to ignored `tmp/rails-optimization/results/`; override with `--output PATH`.
+Use `--image` to override `campfire-reference:app`, and `--cpus` to override server CPUs
+`8-11`. HTTP clients use CPUs `12-15` by default (`--client-cpus`). `--help` lists options.
+
+The rendering probe checks exact response bodies, selected headers and unread payloads,
+and records timing, queries and allocations with MemoryStore, frozen time and fixture-only
+CSRF disabling. Unread fanout excludes adapter I/O.
+
+The HTTP driver uses production Puma/Redis with one worker and five threads. Ruby threads
+each maintain a keep-alive connection, request uncompressed responses, and consume the
+whole body. Login uses normal CSRF protection; all warmup and measured responses must be
+HTTP 200 without transport errors. Measurements exclude Thruster, TLS and gzip. Client
+CPU, JIT warmup and GC can affect throughput; repeat runs and check client saturation.
@@ -0,0 +1,74 @@
+#!/usr/bin/env ruby
+# Compare warm production Puma/Redis requests using isolated seeded containers.
+require "socket"
+require_relative "support"
+require_relative "http_client"
+
+include BenchmarkSupport
+options = parse_options("Compare HTTP throughput with Ruby keep-alive clients; every response must be HTTP 200.",
+  duration: 3.0, paths: "room,messages,sidebar,search", concurrencies: "1,16", client_cpus: "12-15",
+  output: File.join(WORK, "results/http"))
+labels = JSON.parse(File.read(File.join(options[:seed], "labels.json")))
+paths = {
+  "room" => "/rooms/#{labels.fetch('rooms.watercooler')}",
+  "messages" => "/rooms/#{labels.fetch('rooms.watercooler')}/messages?before=#{labels.fetch('messages.busy_060')}",
+  "sidebar" => "/users/me/sidebar", "search" => "/searches?q=coffee"
+}.slice(*options[:paths].split(","))
+abort "--paths must select room,messages,sidebar,search" unless paths.size == options[:paths].split(",").size && !paths.empty?
+concurrencies = options[:concurrencies].split(",").map { |value| Integer(value) }
+abort "--duration and --concurrencies must be positive" unless options[:duration].positive? && !concurrencies.empty? && concurrencies.all?(&:positive?)
+run("taskset", "-pc", options[:client_cpus], Process.pid.to_s)
+work = File.join(WORK, "http")
+assets = prepare_assets(options[:image])
+network = "cf-ruby-bench-#{Process.pid}"
+redis = "#{network}-redis"
+app = "#{network}-app"
+
+begin
+  run("docker", "network", "create", network)
+  run("docker", "run", "-d", "--name", redis, "--network", network, "redis:7-alpine")
+  options[:rounds].times do |iteration|
+    sides = iteration.even? ? %w[before after] : %w[after before]
+    sides.each do |side|
+      remove_container(app)
+      data = File.join(work, "data")
+      prepare_storage(options[:seed], File.join(data, "storage"))
+      FileUtils.mkdir_p([ File.join(data, "tmp/pids"), File.join(data, "log") ])
+      run("docker", "exec", redis, "redis-cli", "FLUSHALL")
+      port = TCPServer.open("127.0.0.1", 0) { |socket| socket.addr[1] }
+      client = BenchmarkHTTPClient.new("http://127.0.0.1:#{port}")
+      source = side == "before" ? options[:baseline] : ROOT
+      command = [ "docker", "run", "-d", "--name", app, "--entrypoint", "", "--network", network,
+        "--cpuset-cpus", options[:cpus], "-p", "127.0.0.1:#{port}:3000" ]
+      command.concat mounts(source => "/rails", File.join(data, "storage") => "/rails/storage",
+        File.join(data, "tmp") => "/rails/tmp", File.join(data, "log") => "/rails/log", assets => "/rails/public/assets")
+      command.concat environment(RAILS_ENV: "production", SECRET_KEY_BASE: "isolated-benchmark-fixture-key", DISABLE_SSL: true,
+        SKIP_TELEMETRY: true, RAILS_LOG_LEVEL: "fatal", WEB_CONCURRENCY: 1, JOB_CONCURRENCY: 1, RAILS_MAX_THREADS: 5,
+        REDIS_URL: "redis://#{redis}:6379/0")
+      command.concat [ options[:image], "bundle", "exec", "puma", "-C", "config/puma.rb" ]
+      run(*command)
+      deadline = clock + 45
+      until client.ready?
+        if clock > deadline
+          File.write(File.join(work, "server.log"), run("docker", "logs", app))
+          raise "server did not become ready; see #{work}/server.log"
+        end
+        sleep 0.1
+      end
+      cookie = client.login(labels)
+      results = {}
+      paths.each do |name, path|
+        client.measure(path, cookie, concurrency: 1, duration: 3)
+        concurrencies.each do |concurrency|
+          results["#{name}_#{concurrency}"] = client.measure(path, cookie, concurrency: concurrency, duration: options[:duration])
+        end
+      end
+      write_json(File.join(options[:output], "#{side}-#{iteration + 1}.json"), results)
+      puts "#{iteration + 1}/#{options[:rounds]}: #{side}"
+    end
+  end
+ensure
+  remove_container(app)
+  remove_container(redis)
+  Open3.capture3("docker", "network", "rm", network)
+end
@@ -0,0 +1,61 @@
+#!/usr/bin/env ruby
+# Compare frozen Rails sources with isolated fixtures and an existing Ruby image.
+require "digest"
+require_relative "support"
+
+include BenchmarkSupport
+options = parse_options("Compare rendering queries, allocations, timing and response parity.",
+  baseline_ref: nil, rounds: 4, output: File.join(WORK, "results/requests"))
+work = File.join(WORK, "runtime")
+FileUtils.mkdir_p([ File.join(work, "tmp"), File.join(work, "log") ])
+assets = prepare_assets(options[:image])
+runs = { "before" => [], "after" => [] }
+order = []
+options[:rounds].times do |iteration|
+  sides = iteration.even? ? %w[before after] : %w[after before]
+  order << sides
+  sides.each do |side|
+    storage = File.join(work, "storage")
+    prepare_storage(options[:seed], storage)
+    source = side == "before" ? options[:baseline] : ROOT
+    command = [ "docker", "run", "--rm", "--entrypoint", "", "--cpuset-cpus", options[:cpus] ]
+    command.concat mounts(source => "/rails", storage => "/rails/storage", File.join(work, "tmp") => "/rails/tmp",
+      File.join(work, "log") => "/rails/log", assets => "/rails/public/assets", File.join(ROOT, "bench") => "/bench",
+      File.join(options[:seed], "labels.json") => "/bench-labels.json")
+    command.concat environment(RAILS_ENV: "production", SECRET_KEY_BASE: "isolated-benchmark-fixture-key", DISABLE_SSL: true,
+      SKIP_TELEMETRY: true, RAILS_LOG_LEVEL: "fatal", BENCH_LABELS: "/bench-labels.json")
+    command.concat [ options[:image], "bundle", "exec", "ruby", "-r", "/rails/config/environment.rb", "/bench/message_hot_paths.rb" ]
+    data = JSON.parse(run(*command))
+    runs[side] << data
+    write_json(File.join(options[:output], "#{side}-#{iteration + 1}.json"), data)
+    puts "#{iteration + 1}/#{options[:rounds]}: #{side}"
+  end
+end
+
+summary = {}
+runs["before"].first.fetch("results").each_key do |name|
+  values = runs.transform_values { |rows| rows.map { |row| row.fetch("results").fetch(name) } }
+  %w[body_sha256 headers payload_sha256].each do |field|
+    expected = values["before"].first[field]
+    raise "#{name}: #{field} differs; no winning summary written" unless values.values.flatten.all? { |row| row[field] == expected }
+  end
+  summary[name] = values.transform_values do |rows|
+    fields = %w[milliseconds allocations queries].select { |field| rows.first.key?(field) }
+    fields.to_h { |field| [ field, median(rows.map { |row| median(row.fetch(field)) }) ] }
+      .merge("round_medians_ms" => rows.map { |row| median(row.fetch("milliseconds")) })
+  end
+  summary[name]["speedup"] = summary[name]["before"]["milliseconds"] / summary[name]["after"]["milliseconds"]
+end
+metadata = {
+  baseline_sha: options[:baseline_ref], candidate_head: run("git", "-C", ROOT, "rev-parse", "HEAD").strip,
+  candidate_app_diff_sha256: Digest::SHA256.hexdigest(run("git", "-C", ROOT, "diff", "--", "app")),
+  platform: RUBY_PLATFORM, cpus: options[:cpus], image: options[:image],
+  image_id: run("docker", "image", "inspect", "-f", "{{.Id}}", options[:image]).strip,
+  body_and_selected_header_parity: "exact across all measured baseline/candidate requests",
+  order: order, ruby: runs["before"].first.fetch("ruby"), rails: runs["before"].first.fetch("rails"),
+  limits: "In-process Rails requests, MemoryStore, frozen clock and fixture-controller CSRF disabled. Fanout excludes adapter I/O. Not network throughput or connection capacity."
+}
+write_json(File.join(options[:output], "summary.json"), metadata: metadata, results: summary)
+summary.each do |name, value|
+  puts "%s: %.2f -> %.2f ms (%.2fx)" % [ name, value["before"]["milliseconds"], value["after"]["milliseconds"], value["speedup"] ]
+end
@@ -0,0 +1,102 @@
+require "cgi"
+require "net/http"
+
+class BenchmarkHTTPClient
+  def initialize(base)
+    @base = URI(base)
+  end
+
+  def ready?
+    connection.start { |http| http.get("/up").code == "200" }
+  rescue IOError, SystemCallError, Timeout::Error, SocketError
+    false
+  end
+
+  def login(labels)
+    cookies = {}
+    connection.start do |http|
+      response = http.get("/session/new", "Accept-Encoding" => "identity")
+      raise "sign-in page: HTTP #{response.code}" unless response.code == "200"
+      merge_cookies(cookies, response)
+      token = response.body[/<meta name="csrf-token" content="([^"]*)"/, 1]
+      raise "sign-in page has no CSRF token" unless token
+      request = Net::HTTP::Post.new("/session")
+      request["Cookie"] = cookie_header(cookies)
+      request["Origin"] = @base.to_s
+      request["Sec-Fetch-Site"] = "same-origin"
+      request.set_form_data(email_address: labels.fetch("emails.david"), password: labels.fetch("passwords.all"),
+        authenticity_token: CGI.unescapeHTML(token))
+      response = http.request(request)
+      merge_cookies(cookies, response)
+      raise "login failed: HTTP #{response.code}" unless response.code == "302" && cookies.key?("session_token")
+    end
+    cookie_header(cookies)
+  end
+
+  def measure(path, cookie, concurrency:, duration:)
+    start = clock
+    deadline = start + duration
+    workers = Array.new(concurrency) do
+      Thread.new do
+        result = { latencies: [], statuses: Hash.new(0), bytes: 0, errors: 0 }
+        while clock < deadline
+          begin
+            connection.start do |http|
+              while clock < deadline
+                requested = clock
+                response = http.get(path, "Cookie" => cookie, "Accept-Encoding" => "identity")
+                result[:latencies] << (clock - requested) * 1000
+                result[:statuses][response.code] += 1
+                result[:bytes] += response.body.bytesize
+              end
+            end
+          rescue IOError, SystemCallError, Timeout::Error, SocketError, Net::HTTPBadResponse
+            result[:errors] += 1
+            sleep 0.01
+          end
+        end
+        result
+      end
+    end
+    samples = workers.map(&:value)
+    elapsed = clock - start
+    latencies = samples.flat_map { |sample| sample[:latencies] }.sort
+    statuses = Hash.new(0)
+    samples.each { |sample| sample[:statuses].each { |status, count| statuses[status] += count } }
+    errors = samples.sum { |sample| sample[:errors] }
+    raise "#{path}: HTTP statuses #{statuses}, #{errors} transport errors" unless errors.zero? && statuses.keys == [ "200" ]
+    { path: path, conc: concurrency, gzip: false, secs: elapsed, rps: latencies.size / elapsed,
+      ok: latencies.size, statuses: statuses, errors: errors,
+      avg_bytes: samples.sum { |sample| sample[:bytes] } / latencies.size,
+      latency_ms: { p50: percentile(latencies, 0.50), p95: percentile(latencies, 0.95), p99: percentile(latencies, 0.99) } }
+  end
+
+  private
+    def connection
+      Net::HTTP.new(@base.host, @base.port, nil).tap do |http|
+        http.open_timeout = 1
+        http.read_timeout = 5
+        http.write_timeout = 5
+        http.max_retries = 0
+      end
+    end
+
+    def merge_cookies(cookies, response)
+      response.get_fields("set-cookie").to_a.each do |header|
+        name, value = header.split(";", 2).first.split("=", 2)
+        cookies[name] = value
+      end
+    end
+
+    def cookie_header(cookies)
+      cookies.map { |name, value| "#{name}=#{value}" }.join("; ")
+    end
+
+    def percentile(values, fraction)
+      values[(values.size * fraction).ceil - 1]
+    end
+
+    def clock
+      Process.clock_gettime(Process::CLOCK_MONOTONIC)
+    end
+end
@@ -0,0 +1,92 @@
+# Run through compare_message_hot_paths.rb against isolated production fixtures.
+require "json"
+require "digest"
+require "active_support/testing/time_helpers"
+
+include ActiveSupport::Testing::TimeHelpers
+travel_to Time.utc(2026, 10, 4, 12)
+
+# Keep framework/rendering measurements independent of Redis/network variance.
+Rails.cache = ActiveSupport::Cache::MemoryStore.new
+ActionView::PartialRenderer.collection_cache = Rails.cache
+ApplicationController.cache_store = Rails.cache
+ApplicationController.descendants.each do |controller|
+  controller.cache_store = Rails.cache
+  controller.allow_forgery_protection = false
+end
+ApplicationController.allow_forgery_protection = false
+
+labels = JSON.parse(File.read(ENV.fetch("BENCH_LABELS")))
+client = ActionDispatch::Integration::Session.new(Rails.application)
+client.host! "campfire-benchmark.test"
+client.post "/session", params: { email_address: labels.fetch("emails.david"), password: labels.fetch("passwords.all") }
+raise "login failed" unless client.response.redirect?
+
+paths = {
+  room: "/rooms/#{labels.fetch('rooms.watercooler')}",
+  messages: "/rooms/#{labels.fetch('rooms.watercooler')}/messages?before=#{labels.fetch('messages.busy_060')}",
+  sidebar: Rails.application.routes.url_helpers.user_sidebar_path,
+  search: "/searches?q=coffee"
+}
+queries = []
+subscriber = ActiveSupport::Notifications.subscribe("sql.active_record") do |*, event|
+  queries << event[:sql] unless event[:cached] || event[:name] == "SCHEMA"
+end
+results = {}
+paths.each do |name, path|
+  %w[cold warm].each do |cache|
+    2.times { client.get path }
+    times, counts, allocations, hashes, headers = [], [], [], [], []
+    Integer(ENV.fetch("BENCH_ITERATIONS", "20")).times do
+      Rails.cache.clear if cache == "cold"
+      queries.clear
+      start_allocations = GC.stat(:total_allocated_objects)
+      start = Process.clock_gettime(Process::CLOCK_MONOTONIC)
+      client.get path
+      times << (Process.clock_gettime(Process::CLOCK_MONOTONIC) - start) * 1000
+      allocations << GC.stat(:total_allocated_objects) - start_allocations
+      raise "#{name}: HTTP #{client.response.status}" unless client.response.status == 200
+      counts << queries.length
+      hashes << Digest::SHA256.hexdigest(client.response.body)
+      headers << client.response.headers.slice("content-type", "etag", "cache-control", "vary")
+    end
+    results["#{name}_#{cache}"] = { milliseconds: times, queries: counts, allocations: allocations,
+                                    body_sha256: hashes.uniq, headers: headers.uniq, body_bytes: client.response.body.bytesize }
+  end
+end
+ActiveSupport::Notifications.unsubscribe(subscriber)
+
+# Real Action Cable encoding/instrumentation, with adapter I/O removed. Keep fanout
+# separate from network delivery capacity, which this probe does not measure.
+room = Room.find(labels.fetch("rooms.watercooler"))
+class BenchmarkPubsub
+  attr_reader :messages
+  def initialize
+    @messages = []
+  end
+  def broadcast(stream, payload)
+    @messages << [ stream, payload ]
+  end
+end
+adapter = BenchmarkPubsub.new
+ActionCable.server.instance_variable_set(:@pubsub, adapter)
+message = Message.new(room: room)
+recipient_ids = (1..1000).to_a
+memberships = Object.new
+memberships.define_singleton_method(:pluck) { |_| recipient_ids }
+room.define_singleton_method(:memberships) { memberships }
+fanout_times, fanout_allocations = [], []
+20.times do
+  adapter.messages.clear
+  allocated = GC.stat(:total_allocated_objects)
+  start = Process.clock_gettime(Process::CLOCK_MONOTONIC)
+  message.send(:broadcast_unread_room)
+  fanout_times << (Process.clock_gettime(Process::CLOCK_MONOTONIC) - start) * 1000
+  fanout_allocations << GC.stat(:total_allocated_objects) - allocated
+  raise "wrong fanout count" unless adapter.messages.size == recipient_ids.size
+  raise "wrong payload" unless adapter.messages.all? { |_, body| JSON.parse(body) == { "roomId" => room.id } }
+end
+results["unread_fanout_1000"] = { milliseconds: fanout_times, allocations: fanout_allocations,
+                                 payload_sha256: Digest::SHA256.hexdigest(adapter.messages.first.last) }
+puts JSON.pretty_generate({ ruby: RUBY_VERSION, rails: Rails.version, iterations: ENV.fetch("BENCH_ITERATIONS", "20").to_i,
+                            cache: "MemoryStore", results: results })
@@ -0,0 +1,84 @@
+require "fileutils"
+require "json"
+require "open3"
+require "optparse"
+
+module BenchmarkSupport
+  ROOT = File.expand_path("..", __dir__)
+  WORK = File.join(ROOT, "tmp/rails-optimization")
+
+  def parse_options(description, defaults)
+    options = { baseline: nil, seed: nil, image: "campfire-reference:app", cpus: "8-11", rounds: 2 }.merge(defaults)
+    parser = OptionParser.new do |parser|
+      parser.banner = "Usage: ruby #{$PROGRAM_NAME} --baseline PATH --seed PATH [options]\n#{description}"
+      options.each do |name, default|
+        type = case default
+        when Integer then Integer
+        when Float then Float
+        else String
+        end
+        parser.on("--#{name.to_s.tr('_', '-')} VALUE", type) { |value| options[name] = value }
+      end
+      parser.on("-h", "--help") { puts parser; exit }
+    end
+    parser.parse!
+    raise OptionParser::InvalidArgument, "unexpected arguments: #{ARGV.join(' ')}" unless ARGV.empty?
+    raise OptionParser::MissingArgument, "--baseline and --seed are required" unless options[:baseline] && options[:seed]
+    raise OptionParser::InvalidArgument, "--rounds must be even and at least 2" unless options[:rounds] >= 2 && options[:rounds].even?
+    %i[baseline seed output].each { |name| options[name] = File.expand_path(options.fetch(name)) }
+    options
+  rescue OptionParser::ParseError => error
+    abort "#{error.message}\n#{parser}"
+  end
+
+  def run(*command, input: nil)
+    output, errors, status = Open3.capture3(*command, stdin_data: input, binmode: true)
+    raise "#{command.first} failed (#{status.exitstatus}): #{errors}" unless status.success?
+    output
+  end
+
+  def remove_container(name)
+    Open3.capture3("docker", "rm", "-f", name)
+  end
+
+  def prepare_storage(seed, destination)
+    FileUtils.rm_rf(destination)
+    FileUtils.mkdir_p(destination)
+    FileUtils.cp_r(File.join(seed, "db"), File.join(destination, "db"))
+    FileUtils.cp_r(File.join(seed, "storage"), File.join(destination, "files"))
+  end
+
+  def prepare_assets(image)
+    assets = File.join(WORK, "runtime/assets")
+    FileUtils.mkdir_p(assets)
+    if Dir.empty?(assets)
+      archive = run("docker", "run", "--rm", "--entrypoint", "", image,
+        "tar", "-C", "/rails/public/assets", "-cf", "-", ".")
+      run("tar", "-xf", "-", "-C", assets, input: archive)
+    end
+    assets
+  end
+
+  def mounts(paths)
+    paths.flat_map { |host, target| [ "-v", "#{host}:#{target}" ] }
+  end
+
+  def environment(values)
+    values.flat_map { |name, value| [ "-e", "#{name}=#{value}" ] }
+  end
+
+  def write_json(path, data)
+    FileUtils.mkdir_p(File.dirname(path))
+    File.write(path, JSON.pretty_generate(data) + "\n")
+  end
+
+  def median(values)
+    values = values.sort
+    middle = values.length / 2
+    values.length.odd? ? values[middle] : (values[middle - 1] + values[middle]) / 2.0
+  end
+
+  def clock
+    Process.clock_gettime(Process::CLOCK_MONOTONIC)
+  end
+end
@@ -2,6 +2,6 @@
 require "rubygems"
 require "bundler/setup"

-ARGV.unshift("--ensure-latest")
+ARGV.unshift("--ensure-latest", "15")

 load Gem.bin_path("brakeman", "brakeman")
@@ -15,9 +15,11 @@ include SSHKit::DSL
 ARCH = "linux/amd64,linux/arm64"
 BUILDER_NAME = "campfire-builder"
 GIT_SHA = `git rev-parse HEAD`.strip
+MANUAL_NOTES = ARGV.delete("--notes")
 VERSION = ARGV[0]

-DOCKER_IMAGE_NAME = "registry.once.com/campfire"
+DOCKER_REGISTRY = "registry.once.com"
+DOCKER_IMAGE_NAME = "#{DOCKER_REGISTRY}/campfire"
 DOCKER_LATEST_IMAGE_NAME = [ DOCKER_IMAGE_NAME, :latest ].join(":")
 DOCKER_TAGGED_IMAGE_NAME = [ DOCKER_IMAGE_NAME, GIT_SHA ].join(":")

@@ -28,7 +30,7 @@ EXPORT_REMOTE_USER = "app"
 EXPORT_DEPLOY_HOSTS = %w[ once-store-app-101 once-store-app-102 ]
 EXPORT_DEPLOY_LOCATION = "/local/app/product_releases/"

-abort "You must specify a version, e.g. `bin/release 1.0.0`" unless VERSION
+abort "You must specify a version, e.g. `bin/release 1.0.0` (pass --notes to write release notes manually)" unless VERSION

 current_branch = `git rev-parse --abbrev-ref HEAD`.strip
 if current_branch != "main"
@@ -46,6 +48,18 @@ def announcing(message)
  yield
 end

+announcing "Checking #{DOCKER_REGISTRY} login..." do
+  unless system "docker", "manifest", "inspect", DOCKER_LATEST_IMAGE_NAME, out: File::NULL, err: File::NULL
+    abort <<~MESSAGE
+      Not logged in to #{DOCKER_REGISTRY}. Run:
+
+        docker login #{DOCKER_REGISTRY}
+
+      The credentials are in the "chatinabox" entry in 1Password.
+    MESSAGE
+  end
+end
+
 on(:local) do
  builder_found = test :docker, :buildx, :inspect, BUILDER_NAME

@@ -57,19 +71,25 @@ on(:local) do
 end

 announcing "Creating GitHub release v#{VERSION}..." do
-  notes_file = "tmp/release_notes.md"
-
  on(:local) do
-    execute :mkdir, "-p", "tmp"
+    if MANUAL_NOTES
+      notes_file = "tmp/release_notes.md"

-    File.write(notes_file, "# What's Changed\n\n- \n")
-    system ENV["EDITOR"] || "vim", notes_file
+      execute :mkdir, "-p", "tmp"

-    unless system "gh", "release", "create", "v#{VERSION}", "--title", "v#{VERSION}", "--notes-file", notes_file
-      abort "Failed to create release; check that the version doesn't already exist"
+      File.write(notes_file, "# What's Changed\n\n- \n")
+      system ENV["EDITOR"] || "vim", notes_file
+
+      unless system "gh", "release", "create", "v#{VERSION}", "--title", "v#{VERSION}", "--notes-file", notes_file
+        abort "Failed to create release; check that the version doesn't already exist"
+      end
+
+      execute :rm, notes_file
+    else
+      unless system "gh", "release", "create", "v#{VERSION}", "--title", "v#{VERSION}", "--generate-notes"
+        abort "Failed to create release; check that the version doesn't already exist"
+      end
    end
-
-    execute :rm, notes_file
  end
 end

@@ -1,6 +1,6 @@
 default: &default
  adapter: redis
-  url: redis://localhost:6379
+  url: <%= ENV.fetch("REDIS_URL") { "redis://localhost:6379" } %>

 development:
  <<: *default
@@ -1,5 +1,6 @@
 require "active_support/core_ext/integer/time"
 require "active_support/core_ext/numeric/bytes"
+require_relative "../../lib/rails_ext/log_scrubbing_formatter"

 Rails.application.configure do
  # Settings specified here will take precedence over those in config/application.rb.
@@ -50,7 +51,7 @@ Rails.application.configure do

  # Log to STDOUT by default
  config.logger = ActiveSupport::Logger.new(STDOUT)
-    .tap  { |logger| logger.formatter = ::Logger::Formatter.new }
+    .tap  { |logger| logger.formatter = LogScrubbingFormatter.new }
    .then { |logger| ActiveSupport::TaggedLogging.new(logger) }

  # Prepend all log lines with the following tags.
@@ -1 +1 @@
 .4.5
 .4.10
				`@@ -0,0 +1 @@`
				`<%= render partial: "autocompletable/users/prompt_item", collection: @page.records, as: :user %>`
				`@@ -0,0 +1 @@`
				`json.partial! "messages/boosts/boost", boost: @boost`
				`@@ -0,0 +1 @@`
				`json.array! @messages, partial: "messages/message", as: :message`
				`@@ -0,0 +1 @@`
				`json.partial! "messages/message", message: @message`